21858620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3631}}^1$

素因数の和:3690

約数の個数: 48

約数和(自身を含む): 53695488

約数和(自身を除く): 31836868

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3631, 6020, 7262, 14524, 18155, 25417, 36310, 50834, 72620, 101668, 127085, 156133, 254170, 312266, 508340, 624532, 780665, 1092931, 1561330, 2185862, 3122660, 4371724, 5464655, 10929310, 21858620]

約数ペア:

[(1, 21858620), (2, 10929310), (4, 5464655), (5, 4371724), (7, 3122660), (10, 2185862), (14, 1561330), (20, 1092931), (28, 780665), (35, 624532), (43, 508340), (70, 312266), (86, 254170), (140, 156133), (172, 127085), (215, 101668), (301, 72620), (430, 50834), (602, 36310), (860, 25417), (1204, 18155), (1505, 14524), (3010, 7262), (3631, 6020)]