20090330

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^2$

素因数の和:195

約数の個数: 48

約数和(自身を含む): 40846680

約数和(自身を除く): 20756350

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 73, 130, 145, 146, 290, 365, 377, 730, 754, 949, 1885, 1898, 2117, 3770, 4234, 4745, 5329, 9490, 10585, 10658, 21170, 26645, 27521, 53290, 55042, 69277, 137605, 138554, 154541, 275210, 309082, 346385, 692770, 772705, 1545410, 2009033, 4018066, 10045165, 20090330]

約数ペア:

[(1, 20090330), (2, 10045165), (5, 4018066), (10, 2009033), (13, 1545410), (26, 772705), (29, 692770), (58, 346385), (65, 309082), (73, 275210), (130, 154541), (145, 138554), (146, 137605), (290, 69277), (365, 55042), (377, 53290), (730, 27521), (754, 26645), (949, 21170), (1885, 10658), (1898, 10585), (2117, 9490), (3770, 5329), (4234, 4745)]