20459420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{563}}^1$

素因数の和:674

約数の個数: 48

約数和(自身を含む): 45480960

約数和(自身を除く): 25021540

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 79, 92, 115, 158, 230, 316, 395, 460, 563, 790, 1126, 1580, 1817, 2252, 2815, 3634, 5630, 7268, 9085, 11260, 12949, 18170, 25898, 36340, 44477, 51796, 64745, 88954, 129490, 177908, 222385, 258980, 444770, 889540, 1022971, 2045942, 4091884, 5114855, 10229710, 20459420]

約数ペア:

[(1, 20459420), (2, 10229710), (4, 5114855), (5, 4091884), (10, 2045942), (20, 1022971), (23, 889540), (46, 444770), (79, 258980), (92, 222385), (115, 177908), (158, 129490), (230, 88954), (316, 64745), (395, 51796), (460, 44477), (563, 36340), (790, 25898), (1126, 18170), (1580, 12949), (1817, 11260), (2252, 9085), (2815, 7268), (3634, 5630)]