21157220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21589}}^1$

素因数の和:21612

約数の個数: 36

約数和(自身を含む): 51686460

約数和(自身を除く): 30529240

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21589, 43178, 86356, 107945, 151123, 215890, 302246, 431780, 604492, 755615, 1057861, 1511230, 2115722, 3022460, 4231444, 5289305, 10578610, 21157220]

約数ペア:

[(1, 21157220), (2, 10578610), (4, 5289305), (5, 4231444), (7, 3022460), (10, 2115722), (14, 1511230), (20, 1057861), (28, 755615), (35, 604492), (49, 431780), (70, 302246), (98, 215890), (140, 151123), (196, 107945), (245, 86356), (490, 43178), (980, 21589)]