20138380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{599}}^1$

素因数の和:690

約数の個数: 36

約数和(自身を含む): 43419600

約数和(自身を除く): 23281220

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 599, 820, 1198, 1681, 2396, 2995, 3362, 5990, 6724, 8405, 11980, 16810, 24559, 33620, 49118, 98236, 122795, 245590, 491180, 1006919, 2013838, 4027676, 5034595, 10069190, 20138380]

約数ペア:

[(1, 20138380), (2, 10069190), (4, 5034595), (5, 4027676), (10, 2013838), (20, 1006919), (41, 491180), (82, 245590), (164, 122795), (205, 98236), (410, 49118), (599, 33620), (820, 24559), (1198, 16810), (1681, 11980), (2396, 8405), (2995, 6724), (3362, 5990)]