81541720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{821}}^1$

素因数の和:1036

約数の個数: 64

約数和(自身を含む): 198858240

約数和(自身を除く): 117316520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 191, 260, 382, 520, 764, 821, 955, 1528, 1642, 1910, 2483, 3284, 3820, 4105, 4966, 6568, 7640, 8210, 9932, 10673, 12415, 16420, 19864, 21346, 24830, 32840, 42692, 49660, 53365, 85384, 99320, 106730, 156811, 213460, 313622, 426920, 627244, 784055, 1254488, 1568110, 2038543, 3136220, 4077086, 6272440, 8154172, 10192715, 16308344, 20385430, 40770860, 81541720]

約数ペア:

[(1, 81541720), (2, 40770860), (4, 20385430), (5, 16308344), (8, 10192715), (10, 8154172), (13, 6272440), (20, 4077086), (26, 3136220), (40, 2038543), (52, 1568110), (65, 1254488), (104, 784055), (130, 627244), (191, 426920), (260, 313622), (382, 213460), (520, 156811), (764, 106730), (821, 99320), (955, 85384), (1528, 53365), (1642, 49660), (1910, 42692), (2483, 32840), (3284, 24830), (3820, 21346), (4105, 19864), (4966, 16420), (6568, 12415), (7640, 10673), (8210, 9932)]