20819175

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 37580928

約数和(自身を除く): 16761753

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 131, 163, 195, 325, 393, 489, 655, 815, 975, 1703, 1965, 2119, 2445, 3275, 4075, 5109, 6357, 8515, 9825, 10595, 12225, 21353, 25545, 31785, 42575, 52975, 64059, 106765, 127725, 158925, 277589, 320295, 533825, 832767, 1387945, 1601475, 4163835, 6939725, 20819175]

約数ペア:

[(1, 20819175), (3, 6939725), (5, 4163835), (13, 1601475), (15, 1387945), (25, 832767), (39, 533825), (65, 320295), (75, 277589), (131, 158925), (163, 127725), (195, 106765), (325, 64059), (393, 52975), (489, 42575), (655, 31785), (815, 25545), (975, 21353), (1703, 12225), (1965, 10595), (2119, 9825), (2445, 8515), (3275, 6357), (4075, 5109)]