21701075

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 31712256

約数和(自身を除く): 10011181

約数列:

[1, 5, 11, 23, 25, 47, 55, 73, 115, 235, 253, 275, 365, 517, 575, 803, 1081, 1175, 1265, 1679, 1825, 2585, 3431, 4015, 5405, 6325, 8395, 11891, 12925, 17155, 18469, 20075, 27025, 37741, 41975, 59455, 78913, 85775, 92345, 188705, 297275, 394565, 461725, 868043, 943525, 1972825, 4340215, 21701075]

約数ペア:

[(1, 21701075), (5, 4340215), (11, 1972825), (23, 943525), (25, 868043), (47, 461725), (55, 394565), (73, 297275), (115, 188705), (235, 92345), (253, 85775), (275, 78913), (365, 59455), (517, 41975), (575, 37741), (803, 27025), (1081, 20075), (1175, 18469), (1265, 17155), (1679, 12925), (1825, 11891), (2585, 8395), (3431, 6325), (4015, 5405)]