21136920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25163}}^1$

素因数の和:25184

約数の個数: 64

約数和(自身を含む): 72472320

約数和(自身を除く): 51335400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25163, 50326, 75489, 100652, 125815, 150978, 176141, 201304, 251630, 301956, 352282, 377445, 503260, 528423, 603912, 704564, 754890, 880705, 1006520, 1056846, 1409128, 1509780, 1761410, 2113692, 2642115, 3019560, 3522820, 4227384, 5284230, 7045640, 10568460, 21136920]

約数ペア:

[(1, 21136920), (2, 10568460), (3, 7045640), (4, 5284230), (5, 4227384), (6, 3522820), (7, 3019560), (8, 2642115), (10, 2113692), (12, 1761410), (14, 1509780), (15, 1409128), (20, 1056846), (21, 1006520), (24, 880705), (28, 754890), (30, 704564), (35, 603912), (40, 528423), (42, 503260), (56, 377445), (60, 352282), (70, 301956), (84, 251630), (105, 201304), (120, 176141), (140, 150978), (168, 125815), (210, 100652), (280, 75489), (420, 50326), (840, 25163)]