21138992

素因数分解:

$2^4\times 7^2\times {\mathrm{59}}^1\times {\mathrm{457}}^1$

素因数の和:538

約数の個数: 60

約数和(自身を含む): 48557160

約数和(自身を除く): 27418168

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 59, 98, 112, 118, 196, 236, 392, 413, 457, 472, 784, 826, 914, 944, 1652, 1828, 2891, 3199, 3304, 3656, 5782, 6398, 6608, 7312, 11564, 12796, 22393, 23128, 25592, 26963, 44786, 46256, 51184, 53926, 89572, 107852, 179144, 188741, 215704, 358288, 377482, 431408, 754964, 1321187, 1509928, 2642374, 3019856, 5284748, 10569496, 21138992]

約数ペア:

[(1, 21138992), (2, 10569496), (4, 5284748), (7, 3019856), (8, 2642374), (14, 1509928), (16, 1321187), (28, 754964), (49, 431408), (56, 377482), (59, 358288), (98, 215704), (112, 188741), (118, 179144), (196, 107852), (236, 89572), (392, 53926), (413, 51184), (457, 46256), (472, 44786), (784, 26963), (826, 25592), (914, 23128), (944, 22393), (1652, 12796), (1828, 11564), (2891, 7312), (3199, 6608), (3304, 6398), (3656, 5782)]