21249525

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{599}}^1$

素因数の和:666

約数の個数: 48

約数和(自身を含む): 39283200

約数和(自身を除く): 18033675

約数列:

[1, 3, 5, 11, 15, 25, 33, 43, 55, 75, 129, 165, 215, 275, 473, 599, 645, 825, 1075, 1419, 1797, 2365, 2995, 3225, 6589, 7095, 8985, 11825, 14975, 19767, 25757, 32945, 35475, 44925, 77271, 98835, 128785, 164725, 283327, 386355, 494175, 643925, 849981, 1416635, 1931775, 4249905, 7083175, 21249525]

約数ペア:

[(1, 21249525), (3, 7083175), (5, 4249905), (11, 1931775), (15, 1416635), (25, 849981), (33, 643925), (43, 494175), (55, 386355), (75, 283327), (129, 164725), (165, 128785), (215, 98835), (275, 77271), (473, 44925), (599, 35475), (645, 32945), (825, 25757), (1075, 19767), (1419, 14975), (1797, 11825), (2365, 8985), (2995, 7095), (3225, 6589)]