81547960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156823}}^1$

素因数の和:156847

約数の個数: 32

約数和(自身を含む): 197598240

約数和(自身を除く): 116050280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 156823, 313646, 627292, 784115, 1254584, 1568230, 2038699, 3136460, 4077398, 6272920, 8154796, 10193495, 16309592, 20386990, 40773980, 81547960]

約数ペア:

[(1, 81547960), (2, 40773980), (4, 20386990), (5, 16309592), (8, 10193495), (10, 8154796), (13, 6272920), (20, 4077398), (26, 3136460), (40, 2038699), (52, 1568230), (65, 1254584), (104, 784115), (130, 627292), (260, 313646), (520, 156823)]