20808272

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{677}}^1$

素因数の和:815

約数の個数: 40

約数和(自身を含む): 43128936

約数和(自身を除く): 22320664

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 113, 136, 226, 272, 452, 677, 904, 1354, 1808, 1921, 2708, 3842, 5416, 7684, 10832, 11509, 15368, 23018, 30736, 46036, 76501, 92072, 153002, 184144, 306004, 612008, 1224016, 1300517, 2601034, 5202068, 10404136, 20808272]

約数ペア:

[(1, 20808272), (2, 10404136), (4, 5202068), (8, 2601034), (16, 1300517), (17, 1224016), (34, 612008), (68, 306004), (113, 184144), (136, 153002), (226, 92072), (272, 76501), (452, 46036), (677, 30736), (904, 23018), (1354, 15368), (1808, 11509), (1921, 10832), (2708, 7684), (3842, 5416)]