20981440

素因数分解:

$2^6\times 5^1\times {\mathrm{173}}^1\times {\mathrm{379}}^1$

素因数の和:569

約数の個数: 56

約数和(自身を含む): 50383440

約数和(自身を除く): 29402000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 173, 320, 346, 379, 692, 758, 865, 1384, 1516, 1730, 1895, 2768, 3032, 3460, 3790, 5536, 6064, 6920, 7580, 11072, 12128, 13840, 15160, 24256, 27680, 30320, 55360, 60640, 65567, 121280, 131134, 262268, 327835, 524536, 655670, 1049072, 1311340, 2098144, 2622680, 4196288, 5245360, 10490720, 20981440]

約数ペア:

[(1, 20981440), (2, 10490720), (4, 5245360), (5, 4196288), (8, 2622680), (10, 2098144), (16, 1311340), (20, 1049072), (32, 655670), (40, 524536), (64, 327835), (80, 262268), (160, 131134), (173, 121280), (320, 65567), (346, 60640), (379, 55360), (692, 30320), (758, 27680), (865, 24256), (1384, 15160), (1516, 13840), (1730, 12128), (1895, 11072), (2768, 7580), (3032, 6920), (3460, 6064), (3790, 5536)]