21871275

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:476

約数の個数: 48

約数和(自身を含む): 39045120

約数和(自身を除く): 17173845

約数列:

[1, 3, 5, 15, 23, 25, 31, 69, 75, 93, 115, 155, 345, 409, 465, 575, 713, 775, 1227, 1725, 2045, 2139, 2325, 3565, 6135, 9407, 10225, 10695, 12679, 17825, 28221, 30675, 38037, 47035, 53475, 63395, 141105, 190185, 235175, 291617, 316975, 705525, 874851, 950925, 1458085, 4374255, 7290425, 21871275]

約数ペア:

[(1, 21871275), (3, 7290425), (5, 4374255), (15, 1458085), (23, 950925), (25, 874851), (31, 705525), (69, 316975), (75, 291617), (93, 235175), (115, 190185), (155, 141105), (345, 63395), (409, 53475), (465, 47035), (575, 38037), (713, 30675), (775, 28221), (1227, 17825), (1725, 12679), (2045, 10695), (2139, 10225), (2325, 9407), (3565, 6135)]