20956725

素因数分解:

$3^4\times 5^2\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:232

約数の個数: 60

約数和(自身を含む): 39610560

約数和(自身を除く): 18653835

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 79, 81, 131, 135, 225, 237, 393, 395, 405, 655, 675, 711, 1179, 1185, 1965, 1975, 2025, 2133, 3275, 3537, 3555, 5895, 5925, 6399, 9825, 10349, 10611, 10665, 17685, 17775, 29475, 31047, 31995, 51745, 53055, 53325, 88425, 93141, 155235, 159975, 258725, 265275, 279423, 465705, 776175, 838269, 1397115, 2328525, 4191345, 6985575, 20956725]

約数ペア:

[(1, 20956725), (3, 6985575), (5, 4191345), (9, 2328525), (15, 1397115), (25, 838269), (27, 776175), (45, 465705), (75, 279423), (79, 265275), (81, 258725), (131, 159975), (135, 155235), (225, 93141), (237, 88425), (393, 53325), (395, 53055), (405, 51745), (655, 31995), (675, 31047), (711, 29475), (1179, 17775), (1185, 17685), (1965, 10665), (1975, 10611), (2025, 10349), (2133, 9825), (3275, 6399), (3537, 5925), (3555, 5895)]