21324560

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6199}}^1$

素因数の和:6255

約数の個数: 40

約数和(自身を含む): 50740800

約数和(自身を除く): 29416240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6199, 12398, 24796, 30995, 49592, 61990, 99184, 123980, 247960, 266557, 495920, 533114, 1066228, 1332785, 2132456, 2665570, 4264912, 5331140, 10662280, 21324560]

約数ペア:

[(1, 21324560), (2, 10662280), (4, 5331140), (5, 4264912), (8, 2665570), (10, 2132456), (16, 1332785), (20, 1066228), (40, 533114), (43, 495920), (80, 266557), (86, 247960), (172, 123980), (215, 99184), (344, 61990), (430, 49592), (688, 30995), (860, 24796), (1720, 12398), (3440, 6199)]