21716120

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{211}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 51287040

約数和(自身を除く): 29570920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 83, 124, 155, 166, 211, 248, 310, 332, 415, 422, 620, 664, 830, 844, 1055, 1240, 1660, 1688, 2110, 2573, 3320, 4220, 5146, 6541, 8440, 10292, 12865, 13082, 17513, 20584, 25730, 26164, 32705, 35026, 51460, 52328, 65410, 70052, 87565, 102920, 130820, 140104, 175130, 261640, 350260, 542903, 700520, 1085806, 2171612, 2714515, 4343224, 5429030, 10858060, 21716120]

約数ペア:

[(1, 21716120), (2, 10858060), (4, 5429030), (5, 4343224), (8, 2714515), (10, 2171612), (20, 1085806), (31, 700520), (40, 542903), (62, 350260), (83, 261640), (124, 175130), (155, 140104), (166, 130820), (211, 102920), (248, 87565), (310, 70052), (332, 65410), (415, 52328), (422, 51460), (620, 35026), (664, 32705), (830, 26164), (844, 25730), (1055, 20584), (1240, 17513), (1660, 13082), (1688, 12865), (2110, 10292), (2573, 8440), (3320, 6541), (4220, 5146)]