20780188

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2137}}^1$

素因数の和:2182

約数の個数: 48

約数和(自身を含む): 45257184

約数和(自身を除く): 24476996

約数列:

[1, 2, 4, 11, 13, 17, 22, 26, 34, 44, 52, 68, 143, 187, 221, 286, 374, 442, 572, 748, 884, 2137, 2431, 4274, 4862, 8548, 9724, 23507, 27781, 36329, 47014, 55562, 72658, 94028, 111124, 145316, 305591, 399619, 472277, 611182, 799238, 944554, 1222364, 1598476, 1889108, 5195047, 10390094, 20780188]

約数ペア:

[(1, 20780188), (2, 10390094), (4, 5195047), (11, 1889108), (13, 1598476), (17, 1222364), (22, 944554), (26, 799238), (34, 611182), (44, 472277), (52, 399619), (68, 305591), (143, 145316), (187, 111124), (221, 94028), (286, 72658), (374, 55562), (442, 47014), (572, 36329), (748, 27781), (884, 23507), (2137, 9724), (2431, 8548), (4274, 4862)]