20771560

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{181}}^1$

素因数の和:362

約数の個数: 64

約数和(自身を含む): 49795200

約数和(自身を除く): 29023640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 151, 152, 181, 190, 302, 362, 380, 604, 724, 755, 760, 905, 1208, 1448, 1510, 1810, 2869, 3020, 3439, 3620, 5738, 6040, 6878, 7240, 11476, 13756, 14345, 17195, 22952, 27331, 27512, 28690, 34390, 54662, 57380, 68780, 109324, 114760, 136655, 137560, 218648, 273310, 519289, 546620, 1038578, 1093240, 2077156, 2596445, 4154312, 5192890, 10385780, 20771560]

約数ペア:

[(1, 20771560), (2, 10385780), (4, 5192890), (5, 4154312), (8, 2596445), (10, 2077156), (19, 1093240), (20, 1038578), (38, 546620), (40, 519289), (76, 273310), (95, 218648), (151, 137560), (152, 136655), (181, 114760), (190, 109324), (302, 68780), (362, 57380), (380, 54662), (604, 34390), (724, 28690), (755, 27512), (760, 27331), (905, 22952), (1208, 17195), (1448, 14345), (1510, 13756), (1810, 11476), (2869, 7240), (3020, 6878), (3439, 6040), (3620, 5738)]