20797740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{509}}^1$

素因数の和:751

約数の個数: 72

約数和(自身を含む): 63488880

約数和(自身を除く): 42691140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 227, 454, 509, 681, 908, 1018, 1135, 1362, 1527, 2036, 2043, 2270, 2545, 2724, 3054, 3405, 4086, 4540, 4581, 5090, 6108, 6810, 7635, 8172, 9162, 10180, 10215, 13620, 15270, 18324, 20430, 22905, 30540, 40860, 45810, 91620, 115543, 231086, 346629, 462172, 577715, 693258, 1039887, 1155430, 1386516, 1733145, 2079774, 2310860, 3466290, 4159548, 5199435, 6932580, 10398870, 20797740]

約数ペア:

[(1, 20797740), (2, 10398870), (3, 6932580), (4, 5199435), (5, 4159548), (6, 3466290), (9, 2310860), (10, 2079774), (12, 1733145), (15, 1386516), (18, 1155430), (20, 1039887), (30, 693258), (36, 577715), (45, 462172), (60, 346629), (90, 231086), (180, 115543), (227, 91620), (454, 45810), (509, 40860), (681, 30540), (908, 22905), (1018, 20430), (1135, 18324), (1362, 15270), (1527, 13620), (2036, 10215), (2043, 10180), (2270, 9162), (2545, 8172), (2724, 7635), (3054, 6810), (3405, 6108), (4086, 5090), (4540, 4581)]