20423080

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 48729600

約数和(自身を除く): 28306520

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 79, 92, 115, 158, 184, 230, 281, 316, 395, 460, 562, 632, 790, 920, 1124, 1405, 1580, 1817, 2248, 2810, 3160, 3634, 5620, 6463, 7268, 9085, 11240, 12926, 14536, 18170, 22199, 25852, 32315, 36340, 44398, 51704, 64630, 72680, 88796, 110995, 129260, 177592, 221990, 258520, 443980, 510577, 887960, 1021154, 2042308, 2552885, 4084616, 5105770, 10211540, 20423080]

約数ペア:

[(1, 20423080), (2, 10211540), (4, 5105770), (5, 4084616), (8, 2552885), (10, 2042308), (20, 1021154), (23, 887960), (40, 510577), (46, 443980), (79, 258520), (92, 221990), (115, 177592), (158, 129260), (184, 110995), (230, 88796), (281, 72680), (316, 64630), (395, 51704), (460, 44398), (562, 36340), (632, 32315), (790, 25852), (920, 22199), (1124, 18170), (1405, 14536), (1580, 12926), (1817, 11240), (2248, 9085), (2810, 7268), (3160, 6463), (3634, 5620)]