20852920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{571}}^1$

素因数の和:676

約数の個数: 64

約数和(自身を含む): 51891840

約数和(自身を除く): 31038920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 83, 88, 110, 166, 220, 332, 415, 440, 571, 664, 830, 913, 1142, 1660, 1826, 2284, 2855, 3320, 3652, 4565, 4568, 5710, 6281, 7304, 9130, 11420, 12562, 18260, 22840, 25124, 31405, 36520, 47393, 50248, 62810, 94786, 125620, 189572, 236965, 251240, 379144, 473930, 521323, 947860, 1042646, 1895720, 2085292, 2606615, 4170584, 5213230, 10426460, 20852920]

約数ペア:

[(1, 20852920), (2, 10426460), (4, 5213230), (5, 4170584), (8, 2606615), (10, 2085292), (11, 1895720), (20, 1042646), (22, 947860), (40, 521323), (44, 473930), (55, 379144), (83, 251240), (88, 236965), (110, 189572), (166, 125620), (220, 94786), (332, 62810), (415, 50248), (440, 47393), (571, 36520), (664, 31405), (830, 25124), (913, 22840), (1142, 18260), (1660, 12562), (1826, 11420), (2284, 9130), (2855, 7304), (3320, 6281), (3652, 5710), (4565, 4568)]