2643740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 6187104

約数和(自身を除く): 3543364

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 197, 220, 244, 305, 394, 610, 671, 788, 985, 1220, 1342, 1970, 2167, 2684, 3355, 3940, 4334, 6710, 8668, 10835, 12017, 13420, 21670, 24034, 43340, 48068, 60085, 120170, 132187, 240340, 264374, 528748, 660935, 1321870, 2643740]

約数ペア:

[(1, 2643740), (2, 1321870), (4, 660935), (5, 528748), (10, 264374), (11, 240340), (20, 132187), (22, 120170), (44, 60085), (55, 48068), (61, 43340), (110, 24034), (122, 21670), (197, 13420), (220, 12017), (244, 10835), (305, 8668), (394, 6710), (610, 4334), (671, 3940), (788, 3355), (985, 2684), (1220, 2167), (1342, 1970)]