20816480

素因数分解:

$2^5\times 5^1\times {\mathrm{281}}^1\times {\mathrm{463}}^1$

素因数の和:759

約数の個数: 48

約数和(自身を含む): 49460544

約数和(自身を除く): 28644064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 281, 463, 562, 926, 1124, 1405, 1852, 2248, 2315, 2810, 3704, 4496, 4630, 5620, 7408, 8992, 9260, 11240, 14816, 18520, 22480, 37040, 44960, 74080, 130103, 260206, 520412, 650515, 1040824, 1301030, 2081648, 2602060, 4163296, 5204120, 10408240, 20816480]

約数ペア:

[(1, 20816480), (2, 10408240), (4, 5204120), (5, 4163296), (8, 2602060), (10, 2081648), (16, 1301030), (20, 1040824), (32, 650515), (40, 520412), (80, 260206), (160, 130103), (281, 74080), (463, 44960), (562, 37040), (926, 22480), (1124, 18520), (1405, 14816), (1852, 11240), (2248, 9260), (2315, 8992), (2810, 7408), (3704, 5620), (4496, 4630)]