20275240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:322

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 27624920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 83, 124, 155, 166, 197, 248, 310, 332, 394, 415, 620, 664, 788, 830, 985, 1240, 1576, 1660, 1970, 2573, 3320, 3940, 5146, 6107, 7880, 10292, 12214, 12865, 16351, 20584, 24428, 25730, 30535, 32702, 48856, 51460, 61070, 65404, 81755, 102920, 122140, 130808, 163510, 244280, 327020, 506881, 654040, 1013762, 2027524, 2534405, 4055048, 5068810, 10137620, 20275240]

約数ペア:

[(1, 20275240), (2, 10137620), (4, 5068810), (5, 4055048), (8, 2534405), (10, 2027524), (20, 1013762), (31, 654040), (40, 506881), (62, 327020), (83, 244280), (124, 163510), (155, 130808), (166, 122140), (197, 102920), (248, 81755), (310, 65404), (332, 61070), (394, 51460), (415, 48856), (620, 32702), (664, 30535), (788, 25730), (830, 24428), (985, 20584), (1240, 16351), (1576, 12865), (1660, 12214), (1970, 10292), (2573, 7880), (3320, 6107), (3940, 5146)]