20790320

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15287}}^1$

素因数の和:15317

約数の個数: 40

約数和(自身を含む): 51184224

約数和(自身を除く): 30393904

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15287, 30574, 61148, 76435, 122296, 152870, 244592, 259879, 305740, 519758, 611480, 1039516, 1222960, 1299395, 2079032, 2598790, 4158064, 5197580, 10395160, 20790320]

約数ペア:

[(1, 20790320), (2, 10395160), (4, 5197580), (5, 4158064), (8, 2598790), (10, 2079032), (16, 1299395), (17, 1222960), (20, 1039516), (34, 611480), (40, 519758), (68, 305740), (80, 259879), (85, 244592), (136, 152870), (170, 122296), (272, 76435), (340, 61148), (680, 30574), (1360, 15287)]