21507616

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:174

約数の個数: 72

約数和(自身を含む): 47453364

約数和(自身を除く): 25945748

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 41, 52, 82, 97, 104, 164, 169, 194, 208, 328, 338, 388, 416, 533, 656, 676, 776, 1066, 1261, 1312, 1352, 1552, 2132, 2522, 2704, 3104, 3977, 4264, 5044, 5408, 6929, 7954, 8528, 10088, 13858, 15908, 16393, 17056, 20176, 27716, 31816, 32786, 40352, 51701, 55432, 63632, 65572, 103402, 110864, 127264, 131144, 206804, 221728, 262288, 413608, 524576, 672113, 827216, 1344226, 1654432, 2688452, 5376904, 10753808, 21507616]

約数ペア:

[(1, 21507616), (2, 10753808), (4, 5376904), (8, 2688452), (13, 1654432), (16, 1344226), (26, 827216), (32, 672113), (41, 524576), (52, 413608), (82, 262288), (97, 221728), (104, 206804), (164, 131144), (169, 127264), (194, 110864), (208, 103402), (328, 65572), (338, 63632), (388, 55432), (416, 51701), (533, 40352), (656, 32786), (676, 31816), (776, 27716), (1066, 20176), (1261, 17056), (1312, 16393), (1352, 15908), (1552, 13858), (2132, 10088), (2522, 8528), (2704, 7954), (3104, 6929), (3977, 5408), (4264, 5044)]