640890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{7121}}^1$

素因数の和:7134

約数の個数: 24

約数和(自身を含む): 1666548

約数和(自身を除く): 1025658

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 7121, 14242, 21363, 35605, 42726, 64089, 71210, 106815, 128178, 213630, 320445, 640890]

約数ペア:

[(1, 640890), (2, 320445), (3, 213630), (5, 128178), (6, 106815), (9, 71210), (10, 64089), (15, 42726), (18, 35605), (30, 21363), (45, 14242), (90, 7121)]