21721210

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{457}}^1$

素因数の和:575

約数の個数: 48

約数和(自身を含む): 46050984

約数和(自身を除く): 24329774

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 97, 98, 194, 245, 457, 485, 490, 679, 914, 970, 1358, 2285, 3199, 3395, 4570, 4753, 6398, 6790, 9506, 15995, 22393, 23765, 31990, 44329, 44786, 47530, 88658, 111965, 221645, 223930, 310303, 443290, 620606, 1551515, 2172121, 3103030, 4344242, 10860605, 21721210]

約数ペア:

[(1, 21721210), (2, 10860605), (5, 4344242), (7, 3103030), (10, 2172121), (14, 1551515), (35, 620606), (49, 443290), (70, 310303), (97, 223930), (98, 221645), (194, 111965), (245, 88658), (457, 47530), (485, 44786), (490, 44329), (679, 31990), (914, 23765), (970, 22393), (1358, 15995), (2285, 9506), (3199, 6790), (3395, 6398), (4570, 4753)]