820162040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{661421}}^1$

素因数の和:661463

約数の個数: 32

約数和(自身を含む): 1904895360

約数和(自身を除く): 1084733320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 661421, 1322842, 2645684, 3307105, 5291368, 6614210, 13228420, 20504051, 26456840, 41008102, 82016204, 102520255, 164032408, 205040510, 410081020, 820162040]

約数ペア:

[(1, 820162040), (2, 410081020), (4, 205040510), (5, 164032408), (8, 102520255), (10, 82016204), (20, 41008102), (31, 26456840), (40, 20504051), (62, 13228420), (124, 6614210), (155, 5291368), (248, 3307105), (310, 2645684), (620, 1322842), (1240, 661421)]