21035240

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{233}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 49617360

約数和(自身を除く): 28582120

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 61, 74, 122, 148, 185, 233, 244, 296, 305, 370, 466, 488, 610, 740, 932, 1165, 1220, 1480, 1864, 2257, 2330, 2440, 4514, 4660, 8621, 9028, 9320, 11285, 14213, 17242, 18056, 22570, 28426, 34484, 43105, 45140, 56852, 68968, 71065, 86210, 90280, 113704, 142130, 172420, 284260, 344840, 525881, 568520, 1051762, 2103524, 2629405, 4207048, 5258810, 10517620, 21035240]

約数ペア:

[(1, 21035240), (2, 10517620), (4, 5258810), (5, 4207048), (8, 2629405), (10, 2103524), (20, 1051762), (37, 568520), (40, 525881), (61, 344840), (74, 284260), (122, 172420), (148, 142130), (185, 113704), (233, 90280), (244, 86210), (296, 71065), (305, 68968), (370, 56852), (466, 45140), (488, 43105), (610, 34484), (740, 28426), (932, 22570), (1165, 18056), (1220, 17242), (1480, 14213), (1864, 11285), (2257, 9320), (2330, 9028), (2440, 8621), (4514, 4660)]