20437875

素因数分解:

$3^2\times 5^3\times {\mathrm{37}}^1\times {\mathrm{491}}^1$

素因数の和:549

約数の個数: 48

約数和(自身を含む): 37915488

約数和(自身を除く): 17477613

約数列:

[1, 3, 5, 9, 15, 25, 37, 45, 75, 111, 125, 185, 225, 333, 375, 491, 555, 925, 1125, 1473, 1665, 2455, 2775, 4419, 4625, 7365, 8325, 12275, 13875, 18167, 22095, 36825, 41625, 54501, 61375, 90835, 110475, 163503, 184125, 272505, 454175, 552375, 817515, 1362525, 2270875, 4087575, 6812625, 20437875]

約数ペア:

[(1, 20437875), (3, 6812625), (5, 4087575), (9, 2270875), (15, 1362525), (25, 817515), (37, 552375), (45, 454175), (75, 272505), (111, 184125), (125, 163503), (185, 110475), (225, 90835), (333, 61375), (375, 54501), (491, 41625), (555, 36825), (925, 22095), (1125, 18167), (1473, 13875), (1665, 12275), (2455, 8325), (2775, 7365), (4419, 4625)]