21481616

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{743}}^1$

素因数の和:903

約数の個数: 40

約数和(自身を含む): 45205440

約数和(自身を除く): 23723824

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 139, 208, 278, 556, 743, 1112, 1486, 1807, 2224, 2972, 3614, 5944, 7228, 9659, 11888, 14456, 19318, 28912, 38636, 77272, 103277, 154544, 206554, 413108, 826216, 1342601, 1652432, 2685202, 5370404, 10740808, 21481616]

約数ペア:

[(1, 21481616), (2, 10740808), (4, 5370404), (8, 2685202), (13, 1652432), (16, 1342601), (26, 826216), (52, 413108), (104, 206554), (139, 154544), (208, 103277), (278, 77272), (556, 38636), (743, 28912), (1112, 19318), (1486, 14456), (1807, 11888), (2224, 9659), (2972, 7228), (3614, 5944)]