21046720

素因数分解:

$2^6\times 5^1\times {\mathrm{89}}^1\times {\mathrm{739}}^1$

素因数の和:845

約数の個数: 56

約数和(自身を含む): 50749200

約数和(自身を除く): 29702480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 160, 178, 320, 356, 445, 712, 739, 890, 1424, 1478, 1780, 2848, 2956, 3560, 3695, 5696, 5912, 7120, 7390, 11824, 14240, 14780, 23648, 28480, 29560, 47296, 59120, 65771, 118240, 131542, 236480, 263084, 328855, 526168, 657710, 1052336, 1315420, 2104672, 2630840, 4209344, 5261680, 10523360, 21046720]

約数ペア:

[(1, 21046720), (2, 10523360), (4, 5261680), (5, 4209344), (8, 2630840), (10, 2104672), (16, 1315420), (20, 1052336), (32, 657710), (40, 526168), (64, 328855), (80, 263084), (89, 236480), (160, 131542), (178, 118240), (320, 65771), (356, 59120), (445, 47296), (712, 29560), (739, 28480), (890, 23648), (1424, 14780), (1478, 14240), (1780, 11824), (2848, 7390), (2956, 7120), (3560, 5912), (3695, 5696)]