20376980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{433}}^1$

素因数の和:636

約数の個数: 48

約数和(自身を含む): 46444944

約数和(自身を除く): 26067964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 181, 260, 362, 433, 724, 866, 905, 1732, 1810, 2165, 2353, 3620, 4330, 4706, 5629, 8660, 9412, 11258, 11765, 22516, 23530, 28145, 47060, 56290, 78373, 112580, 156746, 313492, 391865, 783730, 1018849, 1567460, 2037698, 4075396, 5094245, 10188490, 20376980]

約数ペア:

[(1, 20376980), (2, 10188490), (4, 5094245), (5, 4075396), (10, 2037698), (13, 1567460), (20, 1018849), (26, 783730), (52, 391865), (65, 313492), (130, 156746), (181, 112580), (260, 78373), (362, 56290), (433, 47060), (724, 28145), (866, 23530), (905, 22516), (1732, 11765), (1810, 11258), (2165, 9412), (2353, 8660), (3620, 5629), (4330, 4706)]