21566740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{761}}^1$

素因数の和:892

約数の個数: 48

約数和(自身を含む): 49286160

約数和(自身を除く): 27719420

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 109, 130, 218, 260, 436, 545, 761, 1090, 1417, 1522, 2180, 2834, 3044, 3805, 5668, 7085, 7610, 9893, 14170, 15220, 19786, 28340, 39572, 49465, 82949, 98930, 165898, 197860, 331796, 414745, 829490, 1078337, 1658980, 2156674, 4313348, 5391685, 10783370, 21566740]

約数ペア:

[(1, 21566740), (2, 10783370), (4, 5391685), (5, 4313348), (10, 2156674), (13, 1658980), (20, 1078337), (26, 829490), (52, 414745), (65, 331796), (109, 197860), (130, 165898), (218, 98930), (260, 82949), (436, 49465), (545, 39572), (761, 28340), (1090, 19786), (1417, 15220), (1522, 14170), (2180, 9893), (2834, 7610), (3044, 7085), (3805, 5668)]