20915440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1$

素因数の和:76

約数の個数: 160

約数和(自身を含む): 63745920

約数和(自身を除く): 42830480

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 17, 20, 26, 28, 34, 35, 40, 52, 56, 65, 68, 70, 80, 85, 91, 104, 112, 119, 130, 136, 140, 169, 170, 182, 208, 221, 238, 260, 272, 280, 338, 340, 364, 442, 455, 476, 520, 560, 595, 676, 680, 728, 845, 884, 910, 952, 1040, 1105, 1183, 1190, 1352, 1360, 1456, 1547, 1690, 1768, 1820, 1904, 2197, 2210, 2366, 2380, 2704, 2873, 3094, 3380, 3536, 3640, 4394, 4420, 4732, 4760, 5746, 5915, 6188, 6760, 7280, 7735, 8788, 8840, 9464, 9520, 10985, 11492, 11830, 12376, 13520, 14365, 15379, 15470, 17576, 17680, 18928, 20111, 21970, 22984, 23660, 24752, 28730, 30758, 30940, 35152, 37349, 40222, 43940, 45968, 47320, 57460, 61516, 61880, 74698, 76895, 80444, 87880, 94640, 100555, 114920, 123032, 123760, 149396, 153790, 160888, 175760, 186745, 201110, 229840, 246064, 261443, 298792, 307580, 321776, 373490, 402220, 522886, 597584, 615160, 746980, 804440, 1045772, 1230320, 1307215, 1493960, 1608880, 2091544, 2614430, 2987920, 4183088, 5228860, 10457720, 20915440]

約数ペア:

[(1, 20915440), (2, 10457720), (4, 5228860), (5, 4183088), (7, 2987920), (8, 2614430), (10, 2091544), (13, 1608880), (14, 1493960), (16, 1307215), (17, 1230320), (20, 1045772), (26, 804440), (28, 746980), (34, 615160), (35, 597584), (40, 522886), (52, 402220), (56, 373490), (65, 321776), (68, 307580), (70, 298792), (80, 261443), (85, 246064), (91, 229840), (104, 201110), (112, 186745), (119, 175760), (130, 160888), (136, 153790), (140, 149396), (169, 123760), (170, 123032), (182, 114920), (208, 100555), (221, 94640), (238, 87880), (260, 80444), (272, 76895), (280, 74698), (338, 61880), (340, 61516), (364, 57460), (442, 47320), (455, 45968), (476, 43940), (520, 40222), (560, 37349), (595, 35152), (676, 30940), (680, 30758), (728, 28730), (845, 24752), (884, 23660), (910, 22984), (952, 21970), (1040, 20111), (1105, 18928), (1183, 17680), (1190, 17576), (1352, 15470), (1360, 15379), (1456, 14365), (1547, 13520), (1690, 12376), (1768, 11830), (1820, 11492), (1904, 10985), (2197, 9520), (2210, 9464), (2366, 8840), (2380, 8788), (2704, 7735), (2873, 7280), (3094, 6760), (3380, 6188), (3536, 5915), (3640, 5746), (4394, 4760), (4420, 4732)]