20307920

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2617}}^1$

素因数の和:2727

約数の個数: 40

約数和(自身を含む): 47720904

約数和(自身を除く): 27412984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2617, 3880, 5234, 7760, 10468, 13085, 20936, 26170, 41872, 52340, 104680, 209360, 253849, 507698, 1015396, 1269245, 2030792, 2538490, 4061584, 5076980, 10153960, 20307920]

約数ペア:

[(1, 20307920), (2, 10153960), (4, 5076980), (5, 4061584), (8, 2538490), (10, 2030792), (16, 1269245), (20, 1015396), (40, 507698), (80, 253849), (97, 209360), (194, 104680), (388, 52340), (485, 41872), (776, 26170), (970, 20936), (1552, 13085), (1940, 10468), (2617, 7760), (3880, 5234)]