21987460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5879}}^1$

素因数の和:5916

約数の個数: 48

約数和(自身を含む): 53343360

約数和(自身を除く): 31355900

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5879, 11758, 23516, 29395, 58790, 64669, 99943, 117580, 129338, 199886, 258676, 323345, 399772, 499715, 646690, 999430, 1099373, 1293380, 1998860, 2198746, 4397492, 5496865, 10993730, 21987460]

約数ペア:

[(1, 21987460), (2, 10993730), (4, 5496865), (5, 4397492), (10, 2198746), (11, 1998860), (17, 1293380), (20, 1099373), (22, 999430), (34, 646690), (44, 499715), (55, 399772), (68, 323345), (85, 258676), (110, 199886), (170, 129338), (187, 117580), (220, 99943), (340, 64669), (374, 58790), (748, 29395), (935, 23516), (1870, 11758), (3740, 5879)]