20421080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{509}}^1$

素因数の和:596

約数の個数: 64

約数和(自身を含む): 49572000

約数和(自身を除く): 29150920

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 59, 68, 85, 118, 136, 170, 236, 295, 340, 472, 509, 590, 680, 1003, 1018, 1180, 2006, 2036, 2360, 2545, 4012, 4072, 5015, 5090, 8024, 8653, 10030, 10180, 17306, 20060, 20360, 30031, 34612, 40120, 43265, 60062, 69224, 86530, 120124, 150155, 173060, 240248, 300310, 346120, 510527, 600620, 1021054, 1201240, 2042108, 2552635, 4084216, 5105270, 10210540, 20421080]

約数ペア:

[(1, 20421080), (2, 10210540), (4, 5105270), (5, 4084216), (8, 2552635), (10, 2042108), (17, 1201240), (20, 1021054), (34, 600620), (40, 510527), (59, 346120), (68, 300310), (85, 240248), (118, 173060), (136, 150155), (170, 120124), (236, 86530), (295, 69224), (340, 60062), (472, 43265), (509, 40120), (590, 34612), (680, 30031), (1003, 20360), (1018, 20060), (1180, 17306), (2006, 10180), (2036, 10030), (2360, 8653), (2545, 8024), (4012, 5090), (4072, 5015)]