28405725

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{22279}}^1$

素因数の和:22309

約数の個数: 24

約数和(自身を含む): 49728960

約数和(自身を除く): 21323235

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 22279, 66837, 111395, 334185, 378743, 556975, 1136229, 1670925, 1893715, 5681145, 9468575, 28405725]

約数ペア:

[(1, 28405725), (3, 9468575), (5, 5681145), (15, 1893715), (17, 1670925), (25, 1136229), (51, 556975), (75, 378743), (85, 334185), (255, 111395), (425, 66837), (1275, 22279)]