21351015

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{421}}^1$

素因数の和:469

約数の個数: 72

約数和(自身を含む): 45029088

約数和(自身を除く): 23678073

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 35, 45, 49, 63, 69, 105, 115, 147, 161, 207, 245, 315, 345, 421, 441, 483, 735, 805, 1035, 1127, 1263, 1449, 2105, 2205, 2415, 2947, 3381, 3789, 5635, 6315, 7245, 8841, 9683, 10143, 14735, 16905, 18945, 20629, 26523, 29049, 44205, 48415, 50715, 61887, 67781, 87147, 103145, 132615, 145245, 185661, 203343, 309435, 338905, 435735, 474467, 610029, 928305, 1016715, 1423401, 2372335, 3050145, 4270203, 7117005, 21351015]

約数ペア:

[(1, 21351015), (3, 7117005), (5, 4270203), (7, 3050145), (9, 2372335), (15, 1423401), (21, 1016715), (23, 928305), (35, 610029), (45, 474467), (49, 435735), (63, 338905), (69, 309435), (105, 203343), (115, 185661), (147, 145245), (161, 132615), (207, 103145), (245, 87147), (315, 67781), (345, 61887), (421, 50715), (441, 48415), (483, 44205), (735, 29049), (805, 26523), (1035, 20629), (1127, 18945), (1263, 16905), (1449, 14735), (2105, 10143), (2205, 9683), (2415, 8841), (2947, 7245), (3381, 6315), (3789, 5635)]