28621875

素因数分解:

$3^1\times 5^5\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:142

約数の個数: 48

約数和(自身を含む): 49496832

約数和(自身を除く): 20874957

約数列:

[1, 3, 5, 15, 25, 43, 71, 75, 125, 129, 213, 215, 355, 375, 625, 645, 1065, 1075, 1775, 1875, 3053, 3125, 3225, 5325, 5375, 8875, 9159, 9375, 15265, 16125, 26625, 26875, 44375, 45795, 76325, 80625, 133125, 134375, 221875, 228975, 381625, 403125, 665625, 1144875, 1908125, 5724375, 9540625, 28621875]

約数ペア:

[(1, 28621875), (3, 9540625), (5, 5724375), (15, 1908125), (25, 1144875), (43, 665625), (71, 403125), (75, 381625), (125, 228975), (129, 221875), (213, 134375), (215, 133125), (355, 80625), (375, 76325), (625, 45795), (645, 44375), (1065, 26875), (1075, 26625), (1775, 16125), (1875, 15265), (3053, 9375), (3125, 9159), (3225, 8875), (5325, 5375)]