19821280

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^2\times {\mathrm{67}}^1$

素因数の和:168

約数の個数: 72

約数和(自身を含む): 48657672

約数和(自身を除く): 28836392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 67, 80, 86, 134, 160, 172, 215, 268, 335, 344, 430, 536, 670, 688, 860, 1072, 1340, 1376, 1720, 1849, 2144, 2680, 2881, 3440, 3698, 5360, 5762, 6880, 7396, 9245, 10720, 11524, 14405, 14792, 18490, 23048, 28810, 29584, 36980, 46096, 57620, 59168, 73960, 92192, 115240, 123883, 147920, 230480, 247766, 295840, 460960, 495532, 619415, 991064, 1238830, 1982128, 2477660, 3964256, 4955320, 9910640, 19821280]

約数ペア:

[(1, 19821280), (2, 9910640), (4, 4955320), (5, 3964256), (8, 2477660), (10, 1982128), (16, 1238830), (20, 991064), (32, 619415), (40, 495532), (43, 460960), (67, 295840), (80, 247766), (86, 230480), (134, 147920), (160, 123883), (172, 115240), (215, 92192), (268, 73960), (335, 59168), (344, 57620), (430, 46096), (536, 36980), (670, 29584), (688, 28810), (860, 23048), (1072, 18490), (1340, 14792), (1376, 14405), (1720, 11524), (1849, 10720), (2144, 9245), (2680, 7396), (2881, 6880), (3440, 5762), (3698, 5360)]