21490620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1427}}^1$

素因数の和:1690

約数の個数: 48

約数和(自身を含む): 60455808

約数和(自身を除く): 38965188

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 251, 502, 753, 1004, 1255, 1427, 1506, 2510, 2854, 3012, 3765, 4281, 5020, 5708, 7135, 7530, 8562, 14270, 15060, 17124, 21405, 28540, 42810, 85620, 358177, 716354, 1074531, 1432708, 1790885, 2149062, 3581770, 4298124, 5372655, 7163540, 10745310, 21490620]

約数ペア:

[(1, 21490620), (2, 10745310), (3, 7163540), (4, 5372655), (5, 4298124), (6, 3581770), (10, 2149062), (12, 1790885), (15, 1432708), (20, 1074531), (30, 716354), (60, 358177), (251, 85620), (502, 42810), (753, 28540), (1004, 21405), (1255, 17124), (1427, 15060), (1506, 14270), (2510, 8562), (2854, 7530), (3012, 7135), (3765, 5708), (4281, 5020)]