21561240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{353}}^1\times {\mathrm{509}}^1$

素因数の和:876

約数の個数: 64

約数和(自身を含む): 64994400

約数和(自身を除く): 43433160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 353, 509, 706, 1018, 1059, 1412, 1527, 1765, 2036, 2118, 2545, 2824, 3054, 3530, 4072, 4236, 5090, 5295, 6108, 7060, 7635, 8472, 10180, 10590, 12216, 14120, 15270, 20360, 21180, 30540, 42360, 61080, 179677, 359354, 539031, 718708, 898385, 1078062, 1437416, 1796770, 2156124, 2695155, 3593540, 4312248, 5390310, 7187080, 10780620, 21561240]

約数ペア:

[(1, 21561240), (2, 10780620), (3, 7187080), (4, 5390310), (5, 4312248), (6, 3593540), (8, 2695155), (10, 2156124), (12, 1796770), (15, 1437416), (20, 1078062), (24, 898385), (30, 718708), (40, 539031), (60, 359354), (120, 179677), (353, 61080), (509, 42360), (706, 30540), (1018, 21180), (1059, 20360), (1412, 15270), (1527, 14120), (1765, 12216), (2036, 10590), (2118, 10180), (2545, 8472), (2824, 7635), (3054, 7060), (3530, 6108), (4072, 5295), (4236, 5090)]