20940320

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4513}}^1$

素因数の和:4557

約数の個数: 48

約数和(自身を含む): 51188760

約数和(自身を除く): 30248440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4513, 4640, 9026, 18052, 22565, 36104, 45130, 72208, 90260, 130877, 144416, 180520, 261754, 361040, 523508, 654385, 722080, 1047016, 1308770, 2094032, 2617540, 4188064, 5235080, 10470160, 20940320]

約数ペア:

[(1, 20940320), (2, 10470160), (4, 5235080), (5, 4188064), (8, 2617540), (10, 2094032), (16, 1308770), (20, 1047016), (29, 722080), (32, 654385), (40, 523508), (58, 361040), (80, 261754), (116, 180520), (145, 144416), (160, 130877), (232, 90260), (290, 72208), (464, 45130), (580, 36104), (928, 22565), (1160, 18052), (2320, 9026), (4513, 4640)]