20891290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{2003}}^1$

素因数の和:2166

約数の個数: 32

約数和(自身を含む): 43286400

約数和(自身を除く): 22395110

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 149, 298, 745, 1043, 1490, 2003, 2086, 4006, 5215, 10015, 10430, 14021, 20030, 28042, 70105, 140210, 298447, 596894, 1492235, 2089129, 2984470, 4178258, 10445645, 20891290]

約数ペア:

[(1, 20891290), (2, 10445645), (5, 4178258), (7, 2984470), (10, 2089129), (14, 1492235), (35, 596894), (70, 298447), (149, 140210), (298, 70105), (745, 28042), (1043, 20030), (1490, 14021), (2003, 10430), (2086, 10015), (4006, 5215)]