20267775

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{431}}^1$

素因数の和:477

約数の個数: 72

約数和(自身を含む): 41783040

約数和(自身を除く): 21515265

約数列:

[1, 3, 5, 9, 11, 15, 19, 25, 33, 45, 55, 57, 75, 95, 99, 165, 171, 209, 225, 275, 285, 431, 475, 495, 627, 825, 855, 1045, 1293, 1425, 1881, 2155, 2475, 3135, 3879, 4275, 4741, 5225, 6465, 8189, 9405, 10775, 14223, 15675, 19395, 23705, 24567, 32325, 40945, 42669, 47025, 71115, 73701, 90079, 96975, 118525, 122835, 204725, 213345, 270237, 355575, 368505, 450395, 614175, 810711, 1066725, 1351185, 1842525, 2251975, 4053555, 6755925, 20267775]

約数ペア:

[(1, 20267775), (3, 6755925), (5, 4053555), (9, 2251975), (11, 1842525), (15, 1351185), (19, 1066725), (25, 810711), (33, 614175), (45, 450395), (55, 368505), (57, 355575), (75, 270237), (95, 213345), (99, 204725), (165, 122835), (171, 118525), (209, 96975), (225, 90079), (275, 73701), (285, 71115), (431, 47025), (475, 42669), (495, 40945), (627, 32325), (825, 24567), (855, 23705), (1045, 19395), (1293, 15675), (1425, 14223), (1881, 10775), (2155, 9405), (2475, 8189), (3135, 6465), (3879, 5225), (4275, 4741)]