19990725

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{15679}}^1$

素因数の和:15709

約数の個数: 24

約数和(自身を含む): 34997760

約数和(自身を除く): 15007035

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 15679, 47037, 78395, 235185, 266543, 391975, 799629, 1175925, 1332715, 3998145, 6663575, 19990725]

約数ペア:

[(1, 19990725), (3, 6663575), (5, 3998145), (15, 1332715), (17, 1175925), (25, 799629), (51, 391975), (75, 266543), (85, 235185), (255, 78395), (425, 47037), (1275, 15679)]