19987240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:84

約数の個数: 192

約数和(自身を含む): 61891200

約数和(自身を除く): 41903960

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 17, 19, 20, 26, 28, 34, 35, 38, 40, 52, 56, 65, 68, 70, 76, 85, 91, 95, 104, 119, 130, 133, 136, 140, 152, 170, 182, 190, 221, 238, 247, 260, 266, 280, 289, 323, 340, 364, 380, 442, 455, 476, 494, 520, 532, 578, 595, 646, 665, 680, 728, 760, 884, 910, 952, 988, 1064, 1105, 1156, 1190, 1235, 1292, 1330, 1445, 1547, 1615, 1729, 1768, 1820, 1976, 2023, 2210, 2261, 2312, 2380, 2470, 2584, 2660, 2890, 3094, 3230, 3458, 3640, 3757, 4046, 4199, 4420, 4522, 4760, 4940, 5320, 5491, 5780, 6188, 6460, 6916, 7514, 7735, 8092, 8398, 8645, 8840, 9044, 9880, 10115, 10982, 11305, 11560, 12376, 12920, 13832, 15028, 15470, 16184, 16796, 17290, 18088, 18785, 20230, 20995, 21964, 22610, 26299, 27455, 29393, 30056, 30940, 33592, 34580, 37570, 38437, 40460, 41990, 43928, 45220, 52598, 54910, 58786, 61880, 69160, 71383, 75140, 76874, 80920, 83980, 90440, 105196, 109820, 117572, 131495, 142766, 146965, 150280, 153748, 167960, 192185, 210392, 219640, 235144, 262990, 285532, 293930, 307496, 356915, 384370, 499681, 525980, 571064, 587860, 713830, 768740, 999362, 1051960, 1175720, 1427660, 1537480, 1998724, 2498405, 2855320, 3997448, 4996810, 9993620, 19987240]

約数ペア:

[(1, 19987240), (2, 9993620), (4, 4996810), (5, 3997448), (7, 2855320), (8, 2498405), (10, 1998724), (13, 1537480), (14, 1427660), (17, 1175720), (19, 1051960), (20, 999362), (26, 768740), (28, 713830), (34, 587860), (35, 571064), (38, 525980), (40, 499681), (52, 384370), (56, 356915), (65, 307496), (68, 293930), (70, 285532), (76, 262990), (85, 235144), (91, 219640), (95, 210392), (104, 192185), (119, 167960), (130, 153748), (133, 150280), (136, 146965), (140, 142766), (152, 131495), (170, 117572), (182, 109820), (190, 105196), (221, 90440), (238, 83980), (247, 80920), (260, 76874), (266, 75140), (280, 71383), (289, 69160), (323, 61880), (340, 58786), (364, 54910), (380, 52598), (442, 45220), (455, 43928), (476, 41990), (494, 40460), (520, 38437), (532, 37570), (578, 34580), (595, 33592), (646, 30940), (665, 30056), (680, 29393), (728, 27455), (760, 26299), (884, 22610), (910, 21964), (952, 20995), (988, 20230), (1064, 18785), (1105, 18088), (1156, 17290), (1190, 16796), (1235, 16184), (1292, 15470), (1330, 15028), (1445, 13832), (1547, 12920), (1615, 12376), (1729, 11560), (1768, 11305), (1820, 10982), (1976, 10115), (2023, 9880), (2210, 9044), (2261, 8840), (2312, 8645), (2380, 8398), (2470, 8092), (2584, 7735), (2660, 7514), (2890, 6916), (3094, 6460), (3230, 6188), (3458, 5780), (3640, 5491), (3757, 5320), (4046, 4940), (4199, 4760), (4420, 4522)]