20854960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{223}}^1$

素因数の和:410

約数の個数: 80

約数和(自身を含む): 55996416

約数和(自身を除く): 35141456

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 167, 223, 280, 334, 446, 560, 668, 835, 892, 1115, 1169, 1336, 1561, 1670, 1784, 2230, 2338, 2672, 3122, 3340, 3568, 4460, 4676, 5845, 6244, 6680, 7805, 8920, 9352, 11690, 12488, 13360, 15610, 17840, 18704, 23380, 24976, 31220, 37241, 46760, 62440, 74482, 93520, 124880, 148964, 186205, 260687, 297928, 372410, 521374, 595856, 744820, 1042748, 1303435, 1489640, 2085496, 2606870, 2979280, 4170992, 5213740, 10427480, 20854960]

約数ペア:

[(1, 20854960), (2, 10427480), (4, 5213740), (5, 4170992), (7, 2979280), (8, 2606870), (10, 2085496), (14, 1489640), (16, 1303435), (20, 1042748), (28, 744820), (35, 595856), (40, 521374), (56, 372410), (70, 297928), (80, 260687), (112, 186205), (140, 148964), (167, 124880), (223, 93520), (280, 74482), (334, 62440), (446, 46760), (560, 37241), (668, 31220), (835, 24976), (892, 23380), (1115, 18704), (1169, 17840), (1336, 15610), (1561, 13360), (1670, 12488), (1784, 11690), (2230, 9352), (2338, 8920), (2672, 7805), (3122, 6680), (3340, 6244), (3568, 5845), (4460, 4676)]