20840875

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{659}}^1$

素因数の和:708

約数の個数: 32

約数和(自身を含む): 29652480

約数和(自身を除く): 8811605

約数列:

[1, 5, 11, 23, 25, 55, 115, 125, 253, 275, 575, 659, 1265, 1375, 2875, 3295, 6325, 7249, 15157, 16475, 31625, 36245, 75785, 82375, 166727, 181225, 378925, 833635, 906125, 1894625, 4168175, 20840875]

約数ペア:

[(1, 20840875), (5, 4168175), (11, 1894625), (23, 906125), (25, 833635), (55, 378925), (115, 181225), (125, 166727), (253, 82375), (275, 75785), (575, 36245), (659, 31625), (1265, 16475), (1375, 15157), (2875, 7249), (3295, 6325)]