21793960

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:286

約数の個数: 64

約数和(自身を含む): 51120720

約数和(自身を除く): 29326760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 97, 137, 164, 194, 205, 274, 328, 388, 410, 485, 548, 685, 776, 820, 970, 1096, 1370, 1640, 1940, 2740, 3880, 3977, 5480, 5617, 7954, 11234, 13289, 15908, 19885, 22468, 26578, 28085, 31816, 39770, 44936, 53156, 56170, 66445, 79540, 106312, 112340, 132890, 159080, 224680, 265780, 531560, 544849, 1089698, 2179396, 2724245, 4358792, 5448490, 10896980, 21793960]

約数ペア:

[(1, 21793960), (2, 10896980), (4, 5448490), (5, 4358792), (8, 2724245), (10, 2179396), (20, 1089698), (40, 544849), (41, 531560), (82, 265780), (97, 224680), (137, 159080), (164, 132890), (194, 112340), (205, 106312), (274, 79540), (328, 66445), (388, 56170), (410, 53156), (485, 44936), (548, 39770), (685, 31816), (776, 28085), (820, 26578), (970, 22468), (1096, 19885), (1370, 15908), (1640, 13289), (1940, 11234), (2740, 7954), (3880, 5617), (3977, 5480)]