20801456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{1031}}^1$

素因数の和:1149

約数の個数: 40

約数和(自身を含む): 43893024

約数和(自身を除く): 23091568

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 97, 104, 194, 208, 388, 776, 1031, 1261, 1552, 2062, 2522, 4124, 5044, 8248, 10088, 13403, 16496, 20176, 26806, 53612, 100007, 107224, 200014, 214448, 400028, 800056, 1300091, 1600112, 2600182, 5200364, 10400728, 20801456]

約数ペア:

[(1, 20801456), (2, 10400728), (4, 5200364), (8, 2600182), (13, 1600112), (16, 1300091), (26, 800056), (52, 400028), (97, 214448), (104, 200014), (194, 107224), (208, 100007), (388, 53612), (776, 26806), (1031, 20176), (1261, 16496), (1552, 13403), (2062, 10088), (2522, 8248), (4124, 5044)]