21320728

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{18637}}^1$

素因数の和:18667

約数の個数: 32

約数和(自身を含む): 46967760

約数和(自身を除く): 25647032

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 143, 286, 572, 1144, 18637, 37274, 74548, 149096, 205007, 242281, 410014, 484562, 820028, 969124, 1640056, 1938248, 2665091, 5330182, 10660364, 21320728]

約数ペア:

[(1, 21320728), (2, 10660364), (4, 5330182), (8, 2665091), (11, 1938248), (13, 1640056), (22, 969124), (26, 820028), (44, 484562), (52, 410014), (88, 242281), (104, 205007), (143, 149096), (286, 74548), (572, 37274), (1144, 18637)]