21394920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1361}}^1$

素因数の和:1506

約数の個数: 64

約数和(自身を含む): 64722240

約数和(自身を除く): 43327320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 131, 262, 393, 524, 655, 786, 1048, 1310, 1361, 1572, 1965, 2620, 2722, 3144, 3930, 4083, 5240, 5444, 6805, 7860, 8166, 10888, 13610, 15720, 16332, 20415, 27220, 32664, 40830, 54440, 81660, 163320, 178291, 356582, 534873, 713164, 891455, 1069746, 1426328, 1782910, 2139492, 2674365, 3565820, 4278984, 5348730, 7131640, 10697460, 21394920]

約数ペア:

[(1, 21394920), (2, 10697460), (3, 7131640), (4, 5348730), (5, 4278984), (6, 3565820), (8, 2674365), (10, 2139492), (12, 1782910), (15, 1426328), (20, 1069746), (24, 891455), (30, 713164), (40, 534873), (60, 356582), (120, 178291), (131, 163320), (262, 81660), (393, 54440), (524, 40830), (655, 32664), (786, 27220), (1048, 20415), (1310, 16332), (1361, 15720), (1572, 13610), (1965, 10888), (2620, 8166), (2722, 7860), (3144, 6805), (3930, 5444), (4083, 5240)]