25819820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{7639}}^1$

素因数の和:7674

約数の個数: 36

約数和(自身を含む): 58721040

約数和(自身を除く): 32901220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 7639, 15278, 30556, 38195, 76390, 99307, 152780, 198614, 397228, 496535, 993070, 1290991, 1986140, 2581982, 5163964, 6454955, 12909910, 25819820]

約数ペア:

[(1, 25819820), (2, 12909910), (4, 6454955), (5, 5163964), (10, 2581982), (13, 1986140), (20, 1290991), (26, 993070), (52, 496535), (65, 397228), (130, 198614), (169, 152780), (260, 99307), (338, 76390), (676, 38195), (845, 30556), (1690, 15278), (3380, 7639)]