638683540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{389}}^1\times {\mathrm{439}}^1$

素因数の和:865

約数の個数: 96

約数和(自身を含む): 1556755200

約数和(自身を除く): 918071660

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 389, 439, 748, 778, 878, 935, 1556, 1756, 1870, 1945, 2195, 3740, 3890, 4279, 4390, 4829, 6613, 7463, 7780, 8558, 8780, 9658, 13226, 14926, 17116, 19316, 21395, 24145, 26452, 29852, 33065, 37315, 42790, 48290, 66130, 72743, 74630, 82093, 85580, 96580, 132260, 145486, 149260, 164186, 170771, 290972, 328372, 341542, 363715, 410465, 683084, 727430, 820930, 853855, 1454860, 1641860, 1707710, 1878481, 2903107, 3415420, 3756962, 5806214, 7513924, 9392405, 11612428, 14515535, 18784810, 29031070, 31934177, 37569620, 58062140, 63868354, 127736708, 159670885, 319341770, 638683540]

約数ペア:

[(1, 638683540), (2, 319341770), (4, 159670885), (5, 127736708), (10, 63868354), (11, 58062140), (17, 37569620), (20, 31934177), (22, 29031070), (34, 18784810), (44, 14515535), (55, 11612428), (68, 9392405), (85, 7513924), (110, 5806214), (170, 3756962), (187, 3415420), (220, 2903107), (340, 1878481), (374, 1707710), (389, 1641860), (439, 1454860), (748, 853855), (778, 820930), (878, 727430), (935, 683084), (1556, 410465), (1756, 363715), (1870, 341542), (1945, 328372), (2195, 290972), (3740, 170771), (3890, 164186), (4279, 149260), (4390, 145486), (4829, 132260), (6613, 96580), (7463, 85580), (7780, 82093), (8558, 74630), (8780, 72743), (9658, 66130), (13226, 48290), (14926, 42790), (17116, 37315), (19316, 33065), (21395, 29852), (24145, 26452)]