21198640

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{281}}^1$

素因数の和:358

約数の個数: 80

約数和(自身を含む): 52871616

約数和(自身を除く): 31672976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 41, 46, 80, 82, 92, 115, 164, 184, 205, 230, 281, 328, 368, 410, 460, 562, 656, 820, 920, 943, 1124, 1405, 1640, 1840, 1886, 2248, 2810, 3280, 3772, 4496, 4715, 5620, 6463, 7544, 9430, 11240, 11521, 12926, 15088, 18860, 22480, 23042, 25852, 32315, 37720, 46084, 51704, 57605, 64630, 75440, 92168, 103408, 115210, 129260, 184336, 230420, 258520, 264983, 460840, 517040, 529966, 921680, 1059932, 1324915, 2119864, 2649830, 4239728, 5299660, 10599320, 21198640]

約数ペア:

[(1, 21198640), (2, 10599320), (4, 5299660), (5, 4239728), (8, 2649830), (10, 2119864), (16, 1324915), (20, 1059932), (23, 921680), (40, 529966), (41, 517040), (46, 460840), (80, 264983), (82, 258520), (92, 230420), (115, 184336), (164, 129260), (184, 115210), (205, 103408), (230, 92168), (281, 75440), (328, 64630), (368, 57605), (410, 51704), (460, 46084), (562, 37720), (656, 32315), (820, 25852), (920, 23042), (943, 22480), (1124, 18860), (1405, 15088), (1640, 12926), (1840, 11521), (1886, 11240), (2248, 9430), (2810, 7544), (3280, 6463), (3772, 5620), (4496, 4715)]