21198940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2857}}^1$

素因数の和:2926

約数の個数: 48

約数和(自身を含む): 51855552

約数和(自身を除く): 30656612

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 106, 140, 212, 265, 371, 530, 742, 1060, 1484, 1855, 2857, 3710, 5714, 7420, 11428, 14285, 19999, 28570, 39998, 57140, 79996, 99995, 151421, 199990, 302842, 399980, 605684, 757105, 1059947, 1514210, 2119894, 3028420, 4239788, 5299735, 10599470, 21198940]

約数ペア:

[(1, 21198940), (2, 10599470), (4, 5299735), (5, 4239788), (7, 3028420), (10, 2119894), (14, 1514210), (20, 1059947), (28, 757105), (35, 605684), (53, 399980), (70, 302842), (106, 199990), (140, 151421), (212, 99995), (265, 79996), (371, 57140), (530, 39998), (742, 28570), (1060, 19999), (1484, 14285), (1855, 11428), (2857, 7420), (3710, 5714)]