21262725

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^3\times {\mathrm{71}}^1$

素因数の和:120

約数の個数: 72

約数和(自身を含む): 42479424

約数和(自身を除く): 21216699

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 71, 75, 99, 121, 165, 213, 225, 275, 355, 363, 495, 605, 639, 781, 825, 1065, 1089, 1331, 1775, 1815, 2343, 2475, 3025, 3195, 3905, 3993, 5325, 5445, 6655, 7029, 8591, 9075, 11715, 11979, 15975, 19525, 19965, 25773, 27225, 33275, 35145, 42955, 58575, 59895, 77319, 94501, 99825, 128865, 175725, 214775, 283503, 299475, 386595, 472505, 644325, 850509, 1417515, 1932975, 2362525, 4252545, 7087575, 21262725]

約数ペア:

[(1, 21262725), (3, 7087575), (5, 4252545), (9, 2362525), (11, 1932975), (15, 1417515), (25, 850509), (33, 644325), (45, 472505), (55, 386595), (71, 299475), (75, 283503), (99, 214775), (121, 175725), (165, 128865), (213, 99825), (225, 94501), (275, 77319), (355, 59895), (363, 58575), (495, 42955), (605, 35145), (639, 33275), (781, 27225), (825, 25773), (1065, 19965), (1089, 19525), (1331, 15975), (1775, 11979), (1815, 11715), (2343, 9075), (2475, 8591), (3025, 7029), (3195, 6655), (3905, 5445), (3993, 5325)]