21300812

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 41950272

約数和(自身を除く): 20649460

約数列:

[1, 2, 4, 13, 26, 41, 52, 82, 97, 103, 164, 194, 206, 388, 412, 533, 1066, 1261, 1339, 2132, 2522, 2678, 3977, 4223, 5044, 5356, 7954, 8446, 9991, 15908, 16892, 19982, 39964, 51701, 54899, 103402, 109798, 129883, 206804, 219596, 259766, 409631, 519532, 819262, 1638524, 5325203, 10650406, 21300812]

約数ペア:

[(1, 21300812), (2, 10650406), (4, 5325203), (13, 1638524), (26, 819262), (41, 519532), (52, 409631), (82, 259766), (97, 219596), (103, 206804), (164, 129883), (194, 109798), (206, 103402), (388, 54899), (412, 51701), (533, 39964), (1066, 19982), (1261, 16892), (1339, 15908), (2132, 9991), (2522, 8446), (2678, 7954), (3977, 5356), (4223, 5044)]