640260940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1607}}^1\times {\mathrm{1811}}^1$

素因数の和:3438

約数の個数: 48

約数和(自身を含む): 1468502784

約数和(自身を除く): 828241844

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 1607, 1811, 3214, 3622, 6428, 7244, 8035, 9055, 16070, 17677, 18110, 19921, 32140, 35354, 36220, 39842, 70708, 79684, 88385, 99605, 176770, 199210, 353540, 398420, 2910277, 5820554, 11641108, 14551385, 29102770, 32013047, 58205540, 64026094, 128052188, 160065235, 320130470, 640260940]

約数ペア:

[(1, 640260940), (2, 320130470), (4, 160065235), (5, 128052188), (10, 64026094), (11, 58205540), (20, 32013047), (22, 29102770), (44, 14551385), (55, 11641108), (110, 5820554), (220, 2910277), (1607, 398420), (1811, 353540), (3214, 199210), (3622, 176770), (6428, 99605), (7244, 88385), (8035, 79684), (9055, 70708), (16070, 39842), (17677, 36220), (18110, 35354), (19921, 32140)]