81900388040

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{691}}^1\times {\mathrm{72271}}^1$

素因数の和:73014

約数の個数: 64

約数和(自身を含む): 189046206720

約数和(自身を除く): 107145818680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 691, 820, 1382, 1640, 2764, 3455, 5528, 6910, 13820, 27640, 28331, 56662, 72271, 113324, 141655, 144542, 226648, 283310, 289084, 361355, 566620, 578168, 722710, 1133240, 1445420, 2890840, 2963111, 5926222, 11852444, 14815555, 23704888, 29631110, 49939261, 59262220, 99878522, 118524440, 199757044, 249696305, 399514088, 499392610, 998785220, 1997570440, 2047509701, 4095019402, 8190038804, 10237548505, 16380077608, 20475097010, 40950194020, 81900388040]

約数ペア:

[(1, 81900388040), (2, 40950194020), (4, 20475097010), (5, 16380077608), (8, 10237548505), (10, 8190038804), (20, 4095019402), (40, 2047509701), (41, 1997570440), (82, 998785220), (164, 499392610), (205, 399514088), (328, 249696305), (410, 199757044), (691, 118524440), (820, 99878522), (1382, 59262220), (1640, 49939261), (2764, 29631110), (3455, 23704888), (5528, 14815555), (6910, 11852444), (13820, 5926222), (27640, 2963111), (28331, 2890840), (56662, 1445420), (72271, 1133240), (113324, 722710), (141655, 578168), (144542, 566620), (226648, 361355), (283310, 289084)]