21512360

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:450

約数の個数: 64

約数和(自身を含む): 51408000

約数和(自身を除く): 29895640

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 67, 92, 115, 134, 184, 230, 268, 335, 349, 460, 536, 670, 698, 920, 1340, 1396, 1541, 1745, 2680, 2792, 3082, 3490, 6164, 6980, 7705, 8027, 12328, 13960, 15410, 16054, 23383, 30820, 32108, 40135, 46766, 61640, 64216, 80270, 93532, 116915, 160540, 187064, 233830, 321080, 467660, 537809, 935320, 1075618, 2151236, 2689045, 4302472, 5378090, 10756180, 21512360]

約数ペア:

[(1, 21512360), (2, 10756180), (4, 5378090), (5, 4302472), (8, 2689045), (10, 2151236), (20, 1075618), (23, 935320), (40, 537809), (46, 467660), (67, 321080), (92, 233830), (115, 187064), (134, 160540), (184, 116915), (230, 93532), (268, 80270), (335, 64216), (349, 61640), (460, 46766), (536, 40135), (670, 32108), (698, 30820), (920, 23383), (1340, 16054), (1396, 15410), (1541, 13960), (1745, 12328), (2680, 8027), (2792, 7705), (3082, 6980), (3490, 6164)]