21780240

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{151}}^1\times {\mathrm{601}}^1$

素因数の和:768

約数の個数: 80

約数和(自身を含む): 68078976

約数和(自身を除く): 46298736

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 151, 240, 302, 453, 601, 604, 755, 906, 1202, 1208, 1510, 1803, 1812, 2265, 2404, 2416, 3005, 3020, 3606, 3624, 4530, 4808, 6010, 6040, 7212, 7248, 9015, 9060, 9616, 12020, 12080, 14424, 18030, 18120, 24040, 28848, 36060, 36240, 48080, 72120, 90751, 144240, 181502, 272253, 363004, 453755, 544506, 726008, 907510, 1089012, 1361265, 1452016, 1815020, 2178024, 2722530, 3630040, 4356048, 5445060, 7260080, 10890120, 21780240]

約数ペア:

[(1, 21780240), (2, 10890120), (3, 7260080), (4, 5445060), (5, 4356048), (6, 3630040), (8, 2722530), (10, 2178024), (12, 1815020), (15, 1452016), (16, 1361265), (20, 1089012), (24, 907510), (30, 726008), (40, 544506), (48, 453755), (60, 363004), (80, 272253), (120, 181502), (151, 144240), (240, 90751), (302, 72120), (453, 48080), (601, 36240), (604, 36060), (755, 28848), (906, 24040), (1202, 18120), (1208, 18030), (1510, 14424), (1803, 12080), (1812, 12020), (2265, 9616), (2404, 9060), (2416, 9015), (3005, 7248), (3020, 7212), (3606, 6040), (3624, 6010), (4530, 4808)]