28289240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1423}}^1$

素因数の和:1512

約数の個数: 64

約数和(自身を含む): 73820160

約数和(自身を除く): 45530920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1423, 1988, 2485, 2840, 2846, 3976, 4970, 5692, 7115, 9940, 9961, 11384, 14230, 19880, 19922, 28460, 39844, 49805, 56920, 79688, 99610, 101033, 199220, 202066, 398440, 404132, 505165, 707231, 808264, 1010330, 1414462, 2020660, 2828924, 3536155, 4041320, 5657848, 7072310, 14144620, 28289240]

約数ペア:

[(1, 28289240), (2, 14144620), (4, 7072310), (5, 5657848), (7, 4041320), (8, 3536155), (10, 2828924), (14, 2020660), (20, 1414462), (28, 1010330), (35, 808264), (40, 707231), (56, 505165), (70, 404132), (71, 398440), (140, 202066), (142, 199220), (280, 101033), (284, 99610), (355, 79688), (497, 56920), (568, 49805), (710, 39844), (994, 28460), (1420, 19922), (1423, 19880), (1988, 14230), (2485, 11384), (2840, 9961), (2846, 9940), (3976, 7115), (4970, 5692)]