18972940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2557}}^1$

素因数の和:2626

約数の個数: 48

約数和(自身を含む): 46412352

約数和(自身を除く): 27439412

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, 2557, 3710, 5114, 7420, 10228, 12785, 17899, 25570, 35798, 51140, 71596, 89495, 135521, 178990, 271042, 357980, 542084, 677605, 948647, 1355210, 1897294, 2710420, 3794588, 4743235, 9486470, 18972940]

約数ペア:

[(1, 18972940), (2, 9486470), (4, 4743235), (5, 3794588), (7, 2710420), (10, 1897294), (14, 1355210), (20, 948647), (28, 677605), (35, 542084), (53, 357980), (70, 271042), (106, 178990), (140, 135521), (212, 89495), (265, 71596), (371, 51140), (530, 35798), (742, 25570), (1060, 17899), (1484, 12785), (1855, 10228), (2557, 7420), (3710, 5114)]