20511250

素因数分解:

$2^1\times 5^4\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:352

約数の個数: 40

約数和(自身を含む): 39221820

約数和(自身を除く): 18710570

約数列:

[1, 2, 5, 10, 25, 50, 61, 122, 125, 250, 269, 305, 538, 610, 625, 1250, 1345, 1525, 2690, 3050, 6725, 7625, 13450, 15250, 16409, 32818, 33625, 38125, 67250, 76250, 82045, 164090, 168125, 336250, 410225, 820450, 2051125, 4102250, 10255625, 20511250]

約数ペア:

[(1, 20511250), (2, 10255625), (5, 4102250), (10, 2051125), (25, 820450), (50, 410225), (61, 336250), (122, 168125), (125, 164090), (250, 82045), (269, 76250), (305, 67250), (538, 38125), (610, 33625), (625, 32818), (1250, 16409), (1345, 15250), (1525, 13450), (2690, 7625), (3050, 6725)]