21605440

素因数分解:

$2^6\times 5^1\times {\mathrm{107}}^1\times {\mathrm{631}}^1$

素因数の和:755

約数の個数: 56

約数和(自身を含む): 52011072

約数和(自身を除く): 30405632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 107, 160, 214, 320, 428, 535, 631, 856, 1070, 1262, 1712, 2140, 2524, 3155, 3424, 4280, 5048, 6310, 6848, 8560, 10096, 12620, 17120, 20192, 25240, 34240, 40384, 50480, 67517, 100960, 135034, 201920, 270068, 337585, 540136, 675170, 1080272, 1350340, 2160544, 2700680, 4321088, 5401360, 10802720, 21605440]

約数ペア:

[(1, 21605440), (2, 10802720), (4, 5401360), (5, 4321088), (8, 2700680), (10, 2160544), (16, 1350340), (20, 1080272), (32, 675170), (40, 540136), (64, 337585), (80, 270068), (107, 201920), (160, 135034), (214, 100960), (320, 67517), (428, 50480), (535, 40384), (631, 34240), (856, 25240), (1070, 20192), (1262, 17120), (1712, 12620), (2140, 10096), (2524, 8560), (3155, 6848), (3424, 6310), (4280, 5048)]