19857440

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1571}}^1$

素因数の和:1665

約数の個数: 48

約数和(自身を含む): 47537280

約数和(自身を除く): 27679840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1571, 1580, 2528, 3142, 3160, 6284, 6320, 7855, 12568, 12640, 15710, 25136, 31420, 50272, 62840, 124109, 125680, 248218, 251360, 496436, 620545, 992872, 1241090, 1985744, 2482180, 3971488, 4964360, 9928720, 19857440]

約数ペア:

[(1, 19857440), (2, 9928720), (4, 4964360), (5, 3971488), (8, 2482180), (10, 1985744), (16, 1241090), (20, 992872), (32, 620545), (40, 496436), (79, 251360), (80, 248218), (158, 125680), (160, 124109), (316, 62840), (395, 50272), (632, 31420), (790, 25136), (1264, 15710), (1571, 12640), (1580, 12568), (2528, 7855), (3142, 6320), (3160, 6284)]