21512716

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{211}}^1\times {\mathrm{359}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 38465280

約数和(自身を除く): 16952564

約数列:

[1, 2, 4, 71, 142, 211, 284, 359, 422, 718, 844, 1436, 14981, 25489, 29962, 50978, 59924, 75749, 101956, 151498, 302996, 5378179, 10756358, 21512716]

約数ペア:

[(1, 21512716), (2, 10756358), (4, 5378179), (71, 302996), (142, 151498), (211, 101956), (284, 75749), (359, 59924), (422, 50978), (718, 29962), (844, 25489), (1436, 14981)]