21716240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:209

約数の個数: 160

約数和(自身を含む): 65829120

約数和(自身を除く): 44112880

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 19, 20, 26, 28, 35, 38, 40, 52, 56, 65, 70, 76, 80, 91, 95, 104, 112, 130, 133, 140, 152, 157, 182, 190, 208, 247, 260, 266, 280, 304, 314, 364, 380, 455, 494, 520, 532, 560, 628, 665, 728, 760, 785, 910, 988, 1040, 1064, 1099, 1235, 1256, 1330, 1456, 1520, 1570, 1729, 1820, 1976, 2041, 2128, 2198, 2470, 2512, 2660, 2983, 3140, 3458, 3640, 3952, 4082, 4396, 4940, 5320, 5495, 5966, 6280, 6916, 7280, 8164, 8645, 8792, 9880, 10205, 10640, 10990, 11932, 12560, 13832, 14287, 14915, 16328, 17290, 17584, 19760, 20410, 20881, 21980, 23864, 27664, 28574, 29830, 32656, 34580, 38779, 40820, 41762, 43960, 47728, 57148, 59660, 69160, 71435, 77558, 81640, 83524, 87920, 104405, 114296, 119320, 138320, 142870, 155116, 163280, 167048, 193895, 208810, 228592, 238640, 271453, 285740, 310232, 334096, 387790, 417620, 542906, 571480, 620464, 775580, 835240, 1085812, 1142960, 1357265, 1551160, 1670480, 2171624, 2714530, 3102320, 4343248, 5429060, 10858120, 21716240]

約数ペア:

[(1, 21716240), (2, 10858120), (4, 5429060), (5, 4343248), (7, 3102320), (8, 2714530), (10, 2171624), (13, 1670480), (14, 1551160), (16, 1357265), (19, 1142960), (20, 1085812), (26, 835240), (28, 775580), (35, 620464), (38, 571480), (40, 542906), (52, 417620), (56, 387790), (65, 334096), (70, 310232), (76, 285740), (80, 271453), (91, 238640), (95, 228592), (104, 208810), (112, 193895), (130, 167048), (133, 163280), (140, 155116), (152, 142870), (157, 138320), (182, 119320), (190, 114296), (208, 104405), (247, 87920), (260, 83524), (266, 81640), (280, 77558), (304, 71435), (314, 69160), (364, 59660), (380, 57148), (455, 47728), (494, 43960), (520, 41762), (532, 40820), (560, 38779), (628, 34580), (665, 32656), (728, 29830), (760, 28574), (785, 27664), (910, 23864), (988, 21980), (1040, 20881), (1064, 20410), (1099, 19760), (1235, 17584), (1256, 17290), (1330, 16328), (1456, 14915), (1520, 14287), (1570, 13832), (1729, 12560), (1820, 11932), (1976, 10990), (2041, 10640), (2128, 10205), (2198, 9880), (2470, 8792), (2512, 8645), (2660, 8164), (2983, 7280), (3140, 6916), (3458, 6280), (3640, 5966), (3952, 5495), (4082, 5320), (4396, 4940)]