19936520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1$

素因数の和:294

約数の個数: 64

約数和(自身を含む): 46854720

約数和(自身を除く): 26918200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 67, 86, 134, 172, 173, 215, 268, 335, 344, 346, 430, 536, 670, 692, 860, 865, 1340, 1384, 1720, 1730, 2680, 2881, 3460, 5762, 6920, 7439, 11524, 11591, 14405, 14878, 23048, 23182, 28810, 29756, 37195, 46364, 57620, 57955, 59512, 74390, 92728, 115240, 115910, 148780, 231820, 297560, 463640, 498413, 996826, 1993652, 2492065, 3987304, 4984130, 9968260, 19936520]

約数ペア:

[(1, 19936520), (2, 9968260), (4, 4984130), (5, 3987304), (8, 2492065), (10, 1993652), (20, 996826), (40, 498413), (43, 463640), (67, 297560), (86, 231820), (134, 148780), (172, 115910), (173, 115240), (215, 92728), (268, 74390), (335, 59512), (344, 57955), (346, 57620), (430, 46364), (536, 37195), (670, 29756), (692, 28810), (860, 23182), (865, 23048), (1340, 14878), (1384, 14405), (1720, 11591), (1730, 11524), (2680, 7439), (2881, 6920), (3460, 5762)]