77777960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{373}}^1\times {\mathrm{401}}^1$

素因数の和:798

約数の個数: 64

約数和(自身を含む): 189438480

約数和(自身を除く): 111660520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 373, 401, 520, 746, 802, 1492, 1604, 1865, 2005, 2984, 3208, 3730, 4010, 4849, 5213, 7460, 8020, 9698, 10426, 14920, 16040, 19396, 20852, 24245, 26065, 38792, 41704, 48490, 52130, 96980, 104260, 149573, 193960, 208520, 299146, 598292, 747865, 1196584, 1495730, 1944449, 2991460, 3888898, 5982920, 7777796, 9722245, 15555592, 19444490, 38888980, 77777960]

約数ペア:

[(1, 77777960), (2, 38888980), (4, 19444490), (5, 15555592), (8, 9722245), (10, 7777796), (13, 5982920), (20, 3888898), (26, 2991460), (40, 1944449), (52, 1495730), (65, 1196584), (104, 747865), (130, 598292), (260, 299146), (373, 208520), (401, 193960), (520, 149573), (746, 104260), (802, 96980), (1492, 52130), (1604, 48490), (1865, 41704), (2005, 38792), (2984, 26065), (3208, 24245), (3730, 20852), (4010, 19396), (4849, 16040), (5213, 14920), (7460, 10426), (8020, 9698)]