20986784

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7207}}^1$

素因数の和:7237

約数の個数: 48

約数和(自身を含む): 50859648

約数和(自身を除く): 29872864

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 7207, 14414, 28828, 50449, 57656, 93691, 100898, 115312, 187382, 201796, 230624, 374764, 403592, 655837, 749528, 807184, 1311674, 1499056, 1614368, 2623348, 2998112, 5246696, 10493392, 20986784]

約数ペア:

[(1, 20986784), (2, 10493392), (4, 5246696), (7, 2998112), (8, 2623348), (13, 1614368), (14, 1499056), (16, 1311674), (26, 807184), (28, 749528), (32, 655837), (52, 403592), (56, 374764), (91, 230624), (104, 201796), (112, 187382), (182, 115312), (208, 100898), (224, 93691), (364, 57656), (416, 50449), (728, 28828), (1456, 14414), (2912, 7207)]