217790775

素因数分解:

$3^4\times 5^2\times {\mathrm{131}}^1\times {\mathrm{821}}^1$

素因数の和:974

約数の個数: 60

約数和(自身を含む): 406998504

約数和(自身を除く): 189207729

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 131, 135, 225, 393, 405, 655, 675, 821, 1179, 1965, 2025, 2463, 3275, 3537, 4105, 5895, 7389, 9825, 10611, 12315, 17685, 20525, 22167, 29475, 36945, 53055, 61575, 66501, 88425, 107551, 110835, 184725, 265275, 322653, 332505, 537755, 554175, 967959, 1613265, 1662525, 2688775, 2903877, 4839795, 8066325, 8711631, 14519385, 24198975, 43558155, 72596925, 217790775]

約数ペア:

[(1, 217790775), (3, 72596925), (5, 43558155), (9, 24198975), (15, 14519385), (25, 8711631), (27, 8066325), (45, 4839795), (75, 2903877), (81, 2688775), (131, 1662525), (135, 1613265), (225, 967959), (393, 554175), (405, 537755), (655, 332505), (675, 322653), (821, 265275), (1179, 184725), (1965, 110835), (2025, 107551), (2463, 88425), (3275, 66501), (3537, 61575), (4105, 53055), (5895, 36945), (7389, 29475), (9825, 22167), (10611, 20525), (12315, 17685)]