51128720

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:312

約数の個数: 80

約数和(自身を含む): 123742080

約数和(自身を除く): 72613360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 89, 167, 172, 178, 215, 334, 344, 356, 430, 445, 668, 688, 712, 835, 860, 890, 1336, 1424, 1670, 1720, 1780, 2672, 3340, 3440, 3560, 3827, 6680, 7120, 7181, 7654, 13360, 14362, 14863, 15308, 19135, 28724, 29726, 30616, 35905, 38270, 57448, 59452, 61232, 71810, 74315, 76540, 114896, 118904, 143620, 148630, 153080, 237808, 287240, 297260, 306160, 574480, 594520, 639109, 1189040, 1278218, 2556436, 3195545, 5112872, 6391090, 10225744, 12782180, 25564360, 51128720]

約数ペア:

[(1, 51128720), (2, 25564360), (4, 12782180), (5, 10225744), (8, 6391090), (10, 5112872), (16, 3195545), (20, 2556436), (40, 1278218), (43, 1189040), (80, 639109), (86, 594520), (89, 574480), (167, 306160), (172, 297260), (178, 287240), (215, 237808), (334, 153080), (344, 148630), (356, 143620), (430, 118904), (445, 114896), (668, 76540), (688, 74315), (712, 71810), (835, 61232), (860, 59452), (890, 57448), (1336, 38270), (1424, 35905), (1670, 30616), (1720, 29726), (1780, 28724), (2672, 19135), (3340, 15308), (3440, 14863), (3560, 14362), (3827, 13360), (6680, 7654), (7120, 7181)]