20004325

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{389}}^1$

素因数の和:438

約数の個数: 36

約数和(自身を含む): 28943460

約数和(自身を除く): 8939135

約数列:

[1, 5, 11, 17, 25, 55, 85, 121, 187, 275, 389, 425, 605, 935, 1945, 2057, 3025, 4279, 4675, 6613, 9725, 10285, 21395, 33065, 47069, 51425, 72743, 106975, 165325, 235345, 363715, 800173, 1176725, 1818575, 4000865, 20004325]

約数ペア:

[(1, 20004325), (5, 4000865), (11, 1818575), (17, 1176725), (25, 800173), (55, 363715), (85, 235345), (121, 165325), (187, 106975), (275, 72743), (389, 51425), (425, 47069), (605, 33065), (935, 21395), (1945, 10285), (2057, 9725), (3025, 6613), (4279, 4675)]