28655775

素因数分解:

$3^5\times 5^2\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 54840240

約数和(自身を除く): 26184465

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 53, 75, 81, 89, 135, 159, 225, 243, 265, 267, 405, 445, 477, 675, 795, 801, 1215, 1325, 1335, 1431, 2025, 2225, 2385, 2403, 3975, 4005, 4293, 4717, 6075, 6675, 7155, 7209, 11925, 12015, 12879, 14151, 20025, 21465, 21627, 23585, 35775, 36045, 42453, 60075, 64395, 70755, 107325, 108135, 117925, 127359, 180225, 212265, 321975, 353775, 382077, 540675, 636795, 1061325, 1146231, 1910385, 3183975, 5731155, 9551925, 28655775]

約数ペア:

[(1, 28655775), (3, 9551925), (5, 5731155), (9, 3183975), (15, 1910385), (25, 1146231), (27, 1061325), (45, 636795), (53, 540675), (75, 382077), (81, 353775), (89, 321975), (135, 212265), (159, 180225), (225, 127359), (243, 117925), (265, 108135), (267, 107325), (405, 70755), (445, 64395), (477, 60075), (675, 42453), (795, 36045), (801, 35775), (1215, 23585), (1325, 21627), (1335, 21465), (1431, 20025), (2025, 14151), (2225, 12879), (2385, 12015), (2403, 11925), (3975, 7209), (4005, 7155), (4293, 6675), (4717, 6075)]