20720924

素因数分解:

$2^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1489}}^1$

素因数の和:1578

約数の個数: 36

約数和(自身を含む): 42804720

約数和(自身を除く): 22083796

約数列:

[1, 2, 4, 7, 14, 28, 49, 71, 98, 142, 196, 284, 497, 994, 1489, 1988, 2978, 3479, 5956, 6958, 10423, 13916, 20846, 41692, 72961, 105719, 145922, 211438, 291844, 422876, 740033, 1480066, 2960132, 5180231, 10360462, 20720924]

約数ペア:

[(1, 20720924), (2, 10360462), (4, 5180231), (7, 2960132), (14, 1480066), (28, 740033), (49, 422876), (71, 291844), (98, 211438), (142, 145922), (196, 105719), (284, 72961), (497, 41692), (994, 20846), (1489, 13916), (1988, 10423), (2978, 6958), (3479, 5956)]