21568420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{269}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 48081600

約数和(自身を除く): 26513180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 211, 269, 380, 422, 538, 844, 1055, 1076, 1345, 2110, 2690, 4009, 4220, 5111, 5380, 8018, 10222, 16036, 20045, 20444, 25555, 40090, 51110, 56759, 80180, 102220, 113518, 227036, 283795, 567590, 1078421, 1135180, 2156842, 4313684, 5392105, 10784210, 21568420]

約数ペア:

[(1, 21568420), (2, 10784210), (4, 5392105), (5, 4313684), (10, 2156842), (19, 1135180), (20, 1078421), (38, 567590), (76, 283795), (95, 227036), (190, 113518), (211, 102220), (269, 80180), (380, 56759), (422, 51110), (538, 40090), (844, 25555), (1055, 20444), (1076, 20045), (1345, 16036), (2110, 10222), (2690, 8018), (4009, 5380), (4220, 5111)]