20838620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 49156800

約数和(自身を除く): 28318180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 79, 109, 110, 121, 158, 218, 220, 242, 316, 395, 436, 484, 545, 605, 790, 869, 1090, 1199, 1210, 1580, 1738, 2180, 2398, 2420, 3476, 4345, 4796, 5995, 8611, 8690, 9559, 11990, 13189, 17222, 17380, 19118, 23980, 26378, 34444, 38236, 43055, 47795, 52756, 65945, 86110, 94721, 95590, 131890, 172220, 189442, 191180, 263780, 378884, 473605, 947210, 1041931, 1894420, 2083862, 4167724, 5209655, 10419310, 20838620]

約数ペア:

[(1, 20838620), (2, 10419310), (4, 5209655), (5, 4167724), (10, 2083862), (11, 1894420), (20, 1041931), (22, 947210), (44, 473605), (55, 378884), (79, 263780), (109, 191180), (110, 189442), (121, 172220), (158, 131890), (218, 95590), (220, 94721), (242, 86110), (316, 65945), (395, 52756), (436, 47795), (484, 43055), (545, 38236), (605, 34444), (790, 26378), (869, 23980), (1090, 19118), (1199, 17380), (1210, 17222), (1580, 13189), (1738, 11990), (2180, 9559), (2398, 8690), (2420, 8611), (3476, 5995), (4345, 4796)]