21215678975

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{11717}}^1$

素因数の和:11864

約数の個数: 48

約数和(自身を含む): 28456178688

約数和(自身を除く): 7240499713

約数列:

[1, 5, 23, 25, 47, 67, 115, 235, 335, 575, 1081, 1175, 1541, 1675, 3149, 5405, 7705, 11717, 15745, 27025, 38525, 58585, 72427, 78725, 269491, 292925, 362135, 550699, 785039, 1347455, 1810675, 2753495, 3925195, 6737275, 12666077, 13767475, 18055897, 19625975, 36896833, 63330385, 90279485, 184484165, 316651925, 451397425, 848627159, 922420825, 4243135795, 21215678975]

約数ペア:

[(1, 21215678975), (5, 4243135795), (23, 922420825), (25, 848627159), (47, 451397425), (67, 316651925), (115, 184484165), (235, 90279485), (335, 63330385), (575, 36896833), (1081, 19625975), (1175, 18055897), (1541, 13767475), (1675, 12666077), (3149, 6737275), (5405, 3925195), (7705, 2753495), (11717, 1810675), (15745, 1347455), (27025, 785039), (38525, 550699), (58585, 362135), (72427, 292925), (78725, 269491)]