405307640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{311}}^1\times {\mathrm{1051}}^1$

素因数の和:1404

約数の個数: 64

約数和(自身を含む): 945285120

約数和(自身を除く): 539977480

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 311, 620, 622, 1051, 1240, 1244, 1555, 2102, 2488, 3110, 4204, 5255, 6220, 8408, 9641, 10510, 12440, 19282, 21020, 32581, 38564, 42040, 48205, 65162, 77128, 96410, 130324, 162905, 192820, 260648, 325810, 326861, 385640, 651620, 653722, 1303240, 1307444, 1634305, 2614888, 3268610, 6537220, 10132691, 13074440, 20265382, 40530764, 50663455, 81061528, 101326910, 202653820, 405307640]

約数ペア:

[(1, 405307640), (2, 202653820), (4, 101326910), (5, 81061528), (8, 50663455), (10, 40530764), (20, 20265382), (31, 13074440), (40, 10132691), (62, 6537220), (124, 3268610), (155, 2614888), (248, 1634305), (310, 1307444), (311, 1303240), (620, 653722), (622, 651620), (1051, 385640), (1240, 326861), (1244, 325810), (1555, 260648), (2102, 192820), (2488, 162905), (3110, 130324), (4204, 96410), (5255, 77128), (6220, 65162), (8408, 48205), (9641, 42040), (10510, 38564), (12440, 32581), (19282, 21020)]