20011316

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^2\times {\mathrm{137}}^1$

素因数の和:260

約数の個数: 36

約数和(自身を含む): 38719212

約数和(自身を除く): 18707896

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 137, 212, 274, 548, 689, 1378, 1781, 2756, 2809, 3562, 5618, 7124, 7261, 11236, 14522, 29044, 36517, 73034, 94393, 146068, 188786, 377572, 384833, 769666, 1539332, 5002829, 10005658, 20011316]

約数ペア:

[(1, 20011316), (2, 10005658), (4, 5002829), (13, 1539332), (26, 769666), (52, 384833), (53, 377572), (106, 188786), (137, 146068), (212, 94393), (274, 73034), (548, 36517), (689, 29044), (1378, 14522), (1781, 11236), (2756, 7261), (2809, 7124), (3562, 5618)]