20917736

素因数分解:

$2^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{5261}}^1$

素因数の和:5345

約数の個数: 32

約数和(自身を含む): 45463680

約数和(自身を除く): 24545944

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 71, 142, 284, 497, 568, 994, 1988, 3976, 5261, 10522, 21044, 36827, 42088, 73654, 147308, 294616, 373531, 747062, 1494124, 2614717, 2988248, 5229434, 10458868, 20917736]

約数ペア:

[(1, 20917736), (2, 10458868), (4, 5229434), (7, 2988248), (8, 2614717), (14, 1494124), (28, 747062), (56, 373531), (71, 294616), (142, 147308), (284, 73654), (497, 42088), (568, 36827), (994, 21044), (1988, 10522), (3976, 5261)]