21980478

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{409}}^1$

素因数の和:493

約数の個数: 48

約数和(自身を含む): 48619440

約数和(自身を除く): 26638962

約数列:

[1, 2, 3, 6, 13, 26, 39, 53, 78, 106, 159, 169, 318, 338, 409, 507, 689, 818, 1014, 1227, 1378, 2067, 2454, 4134, 5317, 8957, 10634, 15951, 17914, 21677, 26871, 31902, 43354, 53742, 65031, 69121, 130062, 138242, 207363, 281801, 414726, 563602, 845403, 1690806, 3663413, 7326826, 10990239, 21980478]

約数ペア:

[(1, 21980478), (2, 10990239), (3, 7326826), (6, 3663413), (13, 1690806), (26, 845403), (39, 563602), (53, 414726), (78, 281801), (106, 207363), (159, 138242), (169, 130062), (318, 69121), (338, 65031), (409, 53742), (507, 43354), (689, 31902), (818, 26871), (1014, 21677), (1227, 17914), (1378, 15951), (2067, 10634), (2454, 8957), (4134, 5317)]