81611660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4421}}^1$

素因数の和:4514

約数の個数: 48

約数和(自身を含む): 187209792

約数和(自身を除く): 105598132

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1420, 1846, 3692, 4421, 4615, 8842, 9230, 17684, 18460, 22105, 44210, 57473, 88420, 114946, 229892, 287365, 313891, 574730, 627782, 1149460, 1255564, 1569455, 3138910, 4080583, 6277820, 8161166, 16322332, 20402915, 40805830, 81611660]

約数ペア:

[(1, 81611660), (2, 40805830), (4, 20402915), (5, 16322332), (10, 8161166), (13, 6277820), (20, 4080583), (26, 3138910), (52, 1569455), (65, 1255564), (71, 1149460), (130, 627782), (142, 574730), (260, 313891), (284, 287365), (355, 229892), (710, 114946), (923, 88420), (1420, 57473), (1846, 44210), (3692, 22105), (4421, 18460), (4615, 17684), (8842, 9230)]