51405680

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{3229}}^1$

素因数の和:3441

約数の個数: 40

約数和(自身を含む): 120156000

約数和(自身を除く): 68750320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1990, 3184, 3229, 3980, 6458, 7960, 12916, 15920, 16145, 25832, 32290, 51664, 64580, 129160, 258320, 642571, 1285142, 2570284, 3212855, 5140568, 6425710, 10281136, 12851420, 25702840, 51405680]

約数ペア:

[(1, 51405680), (2, 25702840), (4, 12851420), (5, 10281136), (8, 6425710), (10, 5140568), (16, 3212855), (20, 2570284), (40, 1285142), (80, 642571), (199, 258320), (398, 129160), (796, 64580), (995, 51664), (1592, 32290), (1990, 25832), (3184, 16145), (3229, 15920), (3980, 12916), (6458, 7960)]