20280104

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1789}}^1$

素因数の和:1917

約数の個数: 32

約数和(自身を含む): 41349000

約数和(自身を除く): 21068896

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 109, 218, 436, 872, 1417, 1789, 2834, 3578, 5668, 7156, 11336, 14312, 23257, 46514, 93028, 186056, 195001, 390002, 780004, 1560008, 2535013, 5070026, 10140052, 20280104]

約数ペア:

[(1, 20280104), (2, 10140052), (4, 5070026), (8, 2535013), (13, 1560008), (26, 780004), (52, 390002), (104, 195001), (109, 186056), (218, 93028), (436, 46514), (872, 23257), (1417, 14312), (1789, 11336), (2834, 7156), (3578, 5668)]