21384740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{233}}^1\times {\mathrm{353}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 48707568

約数和(自身を除く): 27322828

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 233, 260, 353, 466, 706, 932, 1165, 1412, 1765, 2330, 3029, 3530, 4589, 4660, 6058, 7060, 9178, 12116, 15145, 18356, 22945, 30290, 45890, 60580, 82249, 91780, 164498, 328996, 411245, 822490, 1069237, 1644980, 2138474, 4276948, 5346185, 10692370, 21384740]

約数ペア:

[(1, 21384740), (2, 10692370), (4, 5346185), (5, 4276948), (10, 2138474), (13, 1644980), (20, 1069237), (26, 822490), (52, 411245), (65, 328996), (130, 164498), (233, 91780), (260, 82249), (353, 60580), (466, 45890), (706, 30290), (932, 22945), (1165, 18356), (1412, 15145), (1765, 12116), (2330, 9178), (3029, 7060), (3530, 6058), (4589, 4660)]