12971800

素因数分解:

$2^3\times 5^2\times {\mathrm{79}}^1\times {\mathrm{821}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 30578400

約数和(自身を除く): 17606600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 79, 100, 158, 200, 316, 395, 632, 790, 821, 1580, 1642, 1975, 3160, 3284, 3950, 4105, 6568, 7900, 8210, 15800, 16420, 20525, 32840, 41050, 64859, 82100, 129718, 164200, 259436, 324295, 518872, 648590, 1297180, 1621475, 2594360, 3242950, 6485900, 12971800]

約数ペア:

[(1, 12971800), (2, 6485900), (4, 3242950), (5, 2594360), (8, 1621475), (10, 1297180), (20, 648590), (25, 518872), (40, 324295), (50, 259436), (79, 164200), (100, 129718), (158, 82100), (200, 64859), (316, 41050), (395, 32840), (632, 20525), (790, 16420), (821, 15800), (1580, 8210), (1642, 7900), (1975, 6568), (3160, 4105), (3284, 3950)]