20809688

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{229}}^1\times {\mathrm{307}}^1$

素因数の和:579

約数の個数: 32

約数和(自身を含む): 40378800

約数和(自身を除く): 19569112

約数列:

[1, 2, 4, 8, 37, 74, 148, 229, 296, 307, 458, 614, 916, 1228, 1832, 2456, 8473, 11359, 16946, 22718, 33892, 45436, 67784, 70303, 90872, 140606, 281212, 562424, 2601211, 5202422, 10404844, 20809688]

約数ペア:

[(1, 20809688), (2, 10404844), (4, 5202422), (8, 2601211), (37, 562424), (74, 281212), (148, 140606), (229, 90872), (296, 70303), (307, 67784), (458, 45436), (614, 33892), (916, 22718), (1228, 16946), (1832, 11359), (2456, 8473)]