21090880

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3877}}^1$

素因数の和:3911

約数の個数: 56

約数和(自身を含む): 53190648

約数和(自身を除く): 32099768

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 3877, 5440, 7754, 15508, 19385, 31016, 38770, 62032, 65909, 77540, 124064, 131818, 155080, 248128, 263636, 310160, 329545, 527272, 620320, 659090, 1054544, 1240640, 1318180, 2109088, 2636360, 4218176, 5272720, 10545440, 21090880]

約数ペア:

[(1, 21090880), (2, 10545440), (4, 5272720), (5, 4218176), (8, 2636360), (10, 2109088), (16, 1318180), (17, 1240640), (20, 1054544), (32, 659090), (34, 620320), (40, 527272), (64, 329545), (68, 310160), (80, 263636), (85, 248128), (136, 155080), (160, 131818), (170, 124064), (272, 77540), (320, 65909), (340, 62032), (544, 38770), (680, 31016), (1088, 19385), (1360, 15508), (2720, 7754), (3877, 5440)]