205712220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{489791}}^1$

素因数の和:489810

約数の個数: 48

約数和(自身を含む): 658280448

約数和(自身を除く): 452568228

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 489791, 979582, 1469373, 1959164, 2448955, 2938746, 3428537, 4897910, 5877492, 6857074, 7346865, 9795820, 10285611, 13714148, 14693730, 17142685, 20571222, 29387460, 34285370, 41142444, 51428055, 68570740, 102856110, 205712220]

約数ペア:

[(1, 205712220), (2, 102856110), (3, 68570740), (4, 51428055), (5, 41142444), (6, 34285370), (7, 29387460), (10, 20571222), (12, 17142685), (14, 14693730), (15, 13714148), (20, 10285611), (21, 9795820), (28, 7346865), (30, 6857074), (35, 5877492), (42, 4897910), (60, 3428537), (70, 2938746), (84, 2448955), (105, 1959164), (140, 1469373), (210, 979582), (420, 489791)]