20754880

素因数分解:

$2^6\times 5^1\times {\mathrm{79}}^1\times {\mathrm{821}}^1$

素因数の和:917

約数の個数: 56

約数和(自身を含む): 50109120

約数和(自身を除く): 29354240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 158, 160, 316, 320, 395, 632, 790, 821, 1264, 1580, 1642, 2528, 3160, 3284, 4105, 5056, 6320, 6568, 8210, 12640, 13136, 16420, 25280, 26272, 32840, 52544, 64859, 65680, 129718, 131360, 259436, 262720, 324295, 518872, 648590, 1037744, 1297180, 2075488, 2594360, 4150976, 5188720, 10377440, 20754880]

約数ペア:

[(1, 20754880), (2, 10377440), (4, 5188720), (5, 4150976), (8, 2594360), (10, 2075488), (16, 1297180), (20, 1037744), (32, 648590), (40, 518872), (64, 324295), (79, 262720), (80, 259436), (158, 131360), (160, 129718), (316, 65680), (320, 64859), (395, 52544), (632, 32840), (790, 26272), (821, 25280), (1264, 16420), (1580, 13136), (1642, 12640), (2528, 8210), (3160, 6568), (3284, 6320), (4105, 5056)]