31664780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{409}}^1$

素因数の和:511

約数の個数: 72

約数和(自身を含む): 78523200

約数和(自身を除く): 46858420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 79, 98, 140, 158, 196, 245, 316, 395, 409, 490, 553, 790, 818, 980, 1106, 1580, 1636, 2045, 2212, 2765, 2863, 3871, 4090, 5530, 5726, 7742, 8180, 11060, 11452, 14315, 15484, 19355, 20041, 28630, 32311, 38710, 40082, 57260, 64622, 77420, 80164, 100205, 129244, 161555, 200410, 226177, 323110, 400820, 452354, 646220, 904708, 1130885, 1583239, 2261770, 3166478, 4523540, 6332956, 7916195, 15832390, 31664780]

約数ペア:

[(1, 31664780), (2, 15832390), (4, 7916195), (5, 6332956), (7, 4523540), (10, 3166478), (14, 2261770), (20, 1583239), (28, 1130885), (35, 904708), (49, 646220), (70, 452354), (79, 400820), (98, 323110), (140, 226177), (158, 200410), (196, 161555), (245, 129244), (316, 100205), (395, 80164), (409, 77420), (490, 64622), (553, 57260), (790, 40082), (818, 38710), (980, 32311), (1106, 28630), (1580, 20041), (1636, 19355), (2045, 15484), (2212, 14315), (2765, 11452), (2863, 11060), (3871, 8180), (4090, 7742), (5530, 5726)]