20791425

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{709}}^1$

素因数の和:762

約数の個数: 48

約数和(自身を含む): 38033280

約数和(自身を除く): 17241855

約数列:

[1, 3, 5, 15, 17, 23, 25, 51, 69, 75, 85, 115, 255, 345, 391, 425, 575, 709, 1173, 1275, 1725, 1955, 2127, 3545, 5865, 9775, 10635, 12053, 16307, 17725, 29325, 36159, 48921, 53175, 60265, 81535, 180795, 244605, 277219, 301325, 407675, 831657, 903975, 1223025, 1386095, 4158285, 6930475, 20791425]

約数ペア:

[(1, 20791425), (3, 6930475), (5, 4158285), (15, 1386095), (17, 1223025), (23, 903975), (25, 831657), (51, 407675), (69, 301325), (75, 277219), (85, 244605), (115, 180795), (255, 81535), (345, 60265), (391, 53175), (425, 48921), (575, 36159), (709, 29325), (1173, 17725), (1275, 16307), (1725, 12053), (1955, 10635), (2127, 9775), (3545, 5865)]