21267040

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2179}}^1$

素因数の和:2255

約数の個数: 48

約数和(自身を含む): 51090480

約数和(自身を除く): 29823440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2179, 2440, 4358, 4880, 8716, 9760, 10895, 17432, 21790, 34864, 43580, 69728, 87160, 132919, 174320, 265838, 348640, 531676, 664595, 1063352, 1329190, 2126704, 2658380, 4253408, 5316760, 10633520, 21267040]

約数ペア:

[(1, 21267040), (2, 10633520), (4, 5316760), (5, 4253408), (8, 2658380), (10, 2126704), (16, 1329190), (20, 1063352), (32, 664595), (40, 531676), (61, 348640), (80, 265838), (122, 174320), (160, 132919), (244, 87160), (305, 69728), (488, 43580), (610, 34864), (976, 21790), (1220, 17432), (1952, 10895), (2179, 9760), (2440, 8716), (4358, 4880)]