19720778888

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{233}}^1\times {\mathrm{3917}}^1$

素因数の和:4266

約数の個数: 64

約数和(自身を含む): 38671130160

約数和(自身を除く): 18950351272

約数列:

[1, 2, 4, 8, 37, 73, 74, 146, 148, 233, 292, 296, 466, 584, 932, 1864, 2701, 3917, 5402, 7834, 8621, 10804, 15668, 17009, 17242, 21608, 31336, 34018, 34484, 68036, 68968, 136072, 144929, 285941, 289858, 571882, 579716, 629333, 912661, 1143764, 1159432, 1258666, 1825322, 2287528, 2517332, 3650644, 5034664, 7301288, 10579817, 21159634, 33768457, 42319268, 66624253, 67536914, 84638536, 133248506, 135073828, 266497012, 270147656, 532994024, 2465097361, 4930194722, 9860389444, 19720778888]

約数ペア:

[(1, 19720778888), (2, 9860389444), (4, 4930194722), (8, 2465097361), (37, 532994024), (73, 270147656), (74, 266497012), (146, 135073828), (148, 133248506), (233, 84638536), (292, 67536914), (296, 66624253), (466, 42319268), (584, 33768457), (932, 21159634), (1864, 10579817), (2701, 7301288), (3917, 5034664), (5402, 3650644), (7834, 2517332), (8621, 2287528), (10804, 1825322), (15668, 1258666), (17009, 1159432), (17242, 1143764), (21608, 912661), (31336, 629333), (34018, 579716), (34484, 571882), (68036, 289858), (68968, 285941), (136072, 144929)]