31454540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{389}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 71547840

約数和(自身を除く): 40093300

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 311, 389, 622, 778, 1244, 1555, 1556, 1945, 3110, 3890, 4043, 5057, 6220, 7780, 8086, 10114, 16172, 20215, 20228, 25285, 40430, 50570, 80860, 101140, 120979, 241958, 483916, 604895, 1209790, 1572727, 2419580, 3145454, 6290908, 7863635, 15727270, 31454540]

約数ペア:

[(1, 31454540), (2, 15727270), (4, 7863635), (5, 6290908), (10, 3145454), (13, 2419580), (20, 1572727), (26, 1209790), (52, 604895), (65, 483916), (130, 241958), (260, 120979), (311, 101140), (389, 80860), (622, 50570), (778, 40430), (1244, 25285), (1555, 20228), (1556, 20215), (1945, 16172), (3110, 10114), (3890, 8086), (4043, 7780), (5057, 6220)]