20809125

素因数分解:

$3^2\times 5^3\times {\mathrm{53}}^1\times {\mathrm{349}}^1$

素因数の和:423

約数の個数: 48

約数和(自身を含む): 38329200

約数和(自身を除く): 17520075

約数列:

[1, 3, 5, 9, 15, 25, 45, 53, 75, 125, 159, 225, 265, 349, 375, 477, 795, 1047, 1125, 1325, 1745, 2385, 3141, 3975, 5235, 6625, 8725, 11925, 15705, 18497, 19875, 26175, 43625, 55491, 59625, 78525, 92485, 130875, 166473, 277455, 392625, 462425, 832365, 1387275, 2312125, 4161825, 6936375, 20809125]

約数ペア:

[(1, 20809125), (3, 6936375), (5, 4161825), (9, 2312125), (15, 1387275), (25, 832365), (45, 462425), (53, 392625), (75, 277455), (125, 166473), (159, 130875), (225, 92485), (265, 78525), (349, 59625), (375, 55491), (477, 43625), (795, 26175), (1047, 19875), (1125, 18497), (1325, 15705), (1745, 11925), (2385, 8725), (3141, 6625), (3975, 5235)]