21399770

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{17}}^1\times {\mathrm{367}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 47692800

約数和(自身を除く): 26293030

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 49, 70, 85, 98, 119, 170, 238, 245, 343, 367, 490, 595, 686, 734, 833, 1190, 1666, 1715, 1835, 2569, 3430, 3670, 4165, 5138, 5831, 6239, 8330, 11662, 12478, 12845, 17983, 25690, 29155, 31195, 35966, 43673, 58310, 62390, 87346, 89915, 125881, 179830, 218365, 251762, 305711, 436730, 611422, 629405, 1258810, 1528555, 2139977, 3057110, 4279954, 10699885, 21399770]

約数ペア:

[(1, 21399770), (2, 10699885), (5, 4279954), (7, 3057110), (10, 2139977), (14, 1528555), (17, 1258810), (34, 629405), (35, 611422), (49, 436730), (70, 305711), (85, 251762), (98, 218365), (119, 179830), (170, 125881), (238, 89915), (245, 87346), (343, 62390), (367, 58310), (490, 43673), (595, 35966), (686, 31195), (734, 29155), (833, 25690), (1190, 17983), (1666, 12845), (1715, 12478), (1835, 11662), (2569, 8330), (3430, 6239), (3670, 5831), (4165, 5138)]