20121920

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{691}}^1$

素因数の和:728

約数の個数: 112

約数和(自身を含む): 59058048

約数和(自身を除く): 38936128

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 320, 364, 416, 448, 455, 520, 560, 691, 728, 832, 910, 1040, 1120, 1382, 1456, 1820, 2080, 2240, 2764, 2912, 3455, 3640, 4160, 4837, 5528, 5824, 6910, 7280, 8983, 9674, 11056, 13820, 14560, 17966, 19348, 22112, 24185, 27640, 29120, 35932, 38696, 44224, 44915, 48370, 55280, 62881, 71864, 77392, 89830, 96740, 110560, 125762, 143728, 154784, 179660, 193480, 221120, 251524, 287456, 309568, 314405, 359320, 386960, 503048, 574912, 628810, 718640, 773920, 1006096, 1257620, 1437280, 1547840, 2012192, 2515240, 2874560, 4024384, 5030480, 10060960, 20121920]

約数ペア:

[(1, 20121920), (2, 10060960), (4, 5030480), (5, 4024384), (7, 2874560), (8, 2515240), (10, 2012192), (13, 1547840), (14, 1437280), (16, 1257620), (20, 1006096), (26, 773920), (28, 718640), (32, 628810), (35, 574912), (40, 503048), (52, 386960), (56, 359320), (64, 314405), (65, 309568), (70, 287456), (80, 251524), (91, 221120), (104, 193480), (112, 179660), (130, 154784), (140, 143728), (160, 125762), (182, 110560), (208, 96740), (224, 89830), (260, 77392), (280, 71864), (320, 62881), (364, 55280), (416, 48370), (448, 44915), (455, 44224), (520, 38696), (560, 35932), (691, 29120), (728, 27640), (832, 24185), (910, 22112), (1040, 19348), (1120, 17966), (1382, 14560), (1456, 13820), (1820, 11056), (2080, 9674), (2240, 8983), (2764, 7280), (2912, 6910), (3455, 5824), (3640, 5528), (4160, 4837)]