21628720

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{7307}}^1$

素因数の和:7357

約数の個数: 40

約数和(自身を含む): 51652944

約数和(自身を除く): 30024224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 7307, 14614, 29228, 36535, 58456, 73070, 116912, 146140, 270359, 292280, 540718, 584560, 1081436, 1351795, 2162872, 2703590, 4325744, 5407180, 10814360, 21628720]

約数ペア:

[(1, 21628720), (2, 10814360), (4, 5407180), (5, 4325744), (8, 2703590), (10, 2162872), (16, 1351795), (20, 1081436), (37, 584560), (40, 540718), (74, 292280), (80, 270359), (148, 146140), (185, 116912), (296, 73070), (370, 58456), (592, 36535), (740, 29228), (1480, 14614), (2960, 7307)]