20546720

素因数分解:

$2^5\times 5^1\times {\mathrm{281}}^1\times {\mathrm{457}}^1$

素因数の和:753

約数の個数: 48

約数和(自身を含む): 48820968

約数和(自身を除く): 28274248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 281, 457, 562, 914, 1124, 1405, 1828, 2248, 2285, 2810, 3656, 4496, 4570, 5620, 7312, 8992, 9140, 11240, 14624, 18280, 22480, 36560, 44960, 73120, 128417, 256834, 513668, 642085, 1027336, 1284170, 2054672, 2568340, 4109344, 5136680, 10273360, 20546720]

約数ペア:

[(1, 20546720), (2, 10273360), (4, 5136680), (5, 4109344), (8, 2568340), (10, 2054672), (16, 1284170), (20, 1027336), (32, 642085), (40, 513668), (80, 256834), (160, 128417), (281, 73120), (457, 44960), (562, 36560), (914, 22480), (1124, 18280), (1405, 14624), (1828, 11240), (2248, 9140), (2285, 8992), (2810, 7312), (3656, 5620), (4496, 4570)]