21245175

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:118

約数の個数: 108

約数和(自身を含む): 46309536

約数和(自身を除く): 25064361

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 41, 45, 47, 49, 63, 75, 105, 123, 141, 147, 175, 205, 225, 235, 245, 287, 315, 329, 369, 423, 441, 525, 615, 705, 735, 861, 987, 1025, 1175, 1225, 1435, 1575, 1645, 1845, 1927, 2009, 2115, 2205, 2303, 2583, 2961, 3075, 3525, 3675, 4305, 4935, 5781, 6027, 6909, 7175, 8225, 9225, 9635, 10045, 10575, 11025, 11515, 12915, 13489, 14805, 17343, 18081, 20727, 21525, 24675, 28905, 30135, 34545, 40467, 48175, 50225, 57575, 64575, 67445, 74025, 86715, 90405, 94423, 103635, 121401, 144525, 150675, 172725, 202335, 283269, 337225, 433575, 452025, 472115, 518175, 607005, 849807, 1011675, 1416345, 2360575, 3035025, 4249035, 7081725, 21245175]

約数ペア:

[(1, 21245175), (3, 7081725), (5, 4249035), (7, 3035025), (9, 2360575), (15, 1416345), (21, 1011675), (25, 849807), (35, 607005), (41, 518175), (45, 472115), (47, 452025), (49, 433575), (63, 337225), (75, 283269), (105, 202335), (123, 172725), (141, 150675), (147, 144525), (175, 121401), (205, 103635), (225, 94423), (235, 90405), (245, 86715), (287, 74025), (315, 67445), (329, 64575), (369, 57575), (423, 50225), (441, 48175), (525, 40467), (615, 34545), (705, 30135), (735, 28905), (861, 24675), (987, 21525), (1025, 20727), (1175, 18081), (1225, 17343), (1435, 14805), (1575, 13489), (1645, 12915), (1845, 11515), (1927, 11025), (2009, 10575), (2115, 10045), (2205, 9635), (2303, 9225), (2583, 8225), (2961, 7175), (3075, 6909), (3525, 6027), (3675, 5781), (4305, 4935)]