21872260

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 47440512

約数和(自身を除く): 25568252

約数列:

[1, 2, 4, 5, 10, 20, 71, 73, 142, 146, 211, 284, 292, 355, 365, 422, 710, 730, 844, 1055, 1420, 1460, 2110, 4220, 5183, 10366, 14981, 15403, 20732, 25915, 29962, 30806, 51830, 59924, 61612, 74905, 77015, 103660, 149810, 154030, 299620, 308060, 1093613, 2187226, 4374452, 5468065, 10936130, 21872260]

約数ペア:

[(1, 21872260), (2, 10936130), (4, 5468065), (5, 4374452), (10, 2187226), (20, 1093613), (71, 308060), (73, 299620), (142, 154030), (146, 149810), (211, 103660), (284, 77015), (292, 74905), (355, 61612), (365, 59924), (422, 51830), (710, 30806), (730, 29962), (844, 25915), (1055, 20732), (1420, 15403), (1460, 14981), (2110, 10366), (4220, 5183)]