20987600

素因数分解:

$2^4\times 5^2\times {\mathrm{71}}^1\times {\mathrm{739}}^1$

素因数の和:828

約数の個数: 60

約数和(自身を含む): 51202080

約数和(自身を除く): 30214480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 71, 80, 100, 142, 200, 284, 355, 400, 568, 710, 739, 1136, 1420, 1478, 1775, 2840, 2956, 3550, 3695, 5680, 5912, 7100, 7390, 11824, 14200, 14780, 18475, 28400, 29560, 36950, 52469, 59120, 73900, 104938, 147800, 209876, 262345, 295600, 419752, 524690, 839504, 1049380, 1311725, 2098760, 2623450, 4197520, 5246900, 10493800, 20987600]

約数ペア:

[(1, 20987600), (2, 10493800), (4, 5246900), (5, 4197520), (8, 2623450), (10, 2098760), (16, 1311725), (20, 1049380), (25, 839504), (40, 524690), (50, 419752), (71, 295600), (80, 262345), (100, 209876), (142, 147800), (200, 104938), (284, 73900), (355, 59120), (400, 52469), (568, 36950), (710, 29560), (739, 28400), (1136, 18475), (1420, 14780), (1478, 14200), (1775, 11824), (2840, 7390), (2956, 7100), (3550, 5912), (3695, 5680)]