21965475

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:209

約数の個数: 72

約数和(自身を含む): 43538880

約数和(自身を除く): 21573405

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 43, 49, 75, 105, 129, 139, 147, 175, 215, 245, 301, 417, 525, 645, 695, 735, 903, 973, 1075, 1225, 1505, 2085, 2107, 2919, 3225, 3475, 3675, 4515, 4865, 5977, 6321, 6811, 7525, 10425, 10535, 14595, 17931, 20433, 22575, 24325, 29885, 31605, 34055, 41839, 52675, 72975, 89655, 102165, 125517, 149425, 158025, 170275, 209195, 292873, 448275, 510825, 627585, 878619, 1045975, 1464365, 3137925, 4393095, 7321825, 21965475]

約数ペア:

[(1, 21965475), (3, 7321825), (5, 4393095), (7, 3137925), (15, 1464365), (21, 1045975), (25, 878619), (35, 627585), (43, 510825), (49, 448275), (75, 292873), (105, 209195), (129, 170275), (139, 158025), (147, 149425), (175, 125517), (215, 102165), (245, 89655), (301, 72975), (417, 52675), (525, 41839), (645, 34055), (695, 31605), (735, 29885), (903, 24325), (973, 22575), (1075, 20433), (1225, 17931), (1505, 14595), (2085, 10535), (2107, 10425), (2919, 7525), (3225, 6811), (3475, 6321), (3675, 5977), (4515, 4865)]