20351720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{173}}^2$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 48766860

約数和(自身を除く): 28415140

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 173, 340, 346, 680, 692, 865, 1384, 1730, 2941, 3460, 5882, 6920, 11764, 14705, 23528, 29410, 29929, 58820, 59858, 117640, 119716, 149645, 239432, 299290, 508793, 598580, 1017586, 1197160, 2035172, 2543965, 4070344, 5087930, 10175860, 20351720]

約数ペア:

[(1, 20351720), (2, 10175860), (4, 5087930), (5, 4070344), (8, 2543965), (10, 2035172), (17, 1197160), (20, 1017586), (34, 598580), (40, 508793), (68, 299290), (85, 239432), (136, 149645), (170, 119716), (173, 117640), (340, 59858), (346, 58820), (680, 29929), (692, 29410), (865, 23528), (1384, 14705), (1730, 11764), (2941, 6920), (3460, 5882)]