81189004

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 158124960

約数和(自身を除く): 76935956

約数列:

[1, 2, 4, 13, 26, 52, 53, 89, 106, 178, 212, 331, 356, 662, 689, 1157, 1324, 1378, 2314, 2756, 4303, 4628, 4717, 8606, 9434, 17212, 17543, 18868, 29459, 35086, 58918, 61321, 70172, 117836, 122642, 228059, 245284, 382967, 456118, 765934, 912236, 1531868, 1561327, 3122654, 6245308, 20297251, 40594502, 81189004]

約数ペア:

[(1, 81189004), (2, 40594502), (4, 20297251), (13, 6245308), (26, 3122654), (52, 1561327), (53, 1531868), (89, 912236), (106, 765934), (178, 456118), (212, 382967), (331, 245284), (356, 228059), (662, 122642), (689, 117836), (1157, 70172), (1324, 61321), (1378, 58918), (2314, 35086), (2756, 29459), (4303, 18868), (4628, 17543), (4717, 17212), (8606, 9434)]