20949075

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{283}}^1$

素因数の和:353

約数の個数: 72

約数和(自身を含む): 43949568

約数和(自身を除く): 23000493

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 47, 63, 75, 105, 141, 175, 225, 235, 283, 315, 329, 423, 525, 705, 849, 987, 1175, 1415, 1575, 1645, 1981, 2115, 2547, 2961, 3525, 4245, 4935, 5943, 7075, 8225, 9905, 10575, 12735, 13301, 14805, 17829, 21225, 24675, 29715, 39903, 49525, 63675, 66505, 74025, 89145, 93107, 119709, 148575, 199515, 279321, 332525, 445725, 465535, 598545, 837963, 997575, 1396605, 2327675, 2992725, 4189815, 6983025, 20949075]

約数ペア:

[(1, 20949075), (3, 6983025), (5, 4189815), (7, 2992725), (9, 2327675), (15, 1396605), (21, 997575), (25, 837963), (35, 598545), (45, 465535), (47, 445725), (63, 332525), (75, 279321), (105, 199515), (141, 148575), (175, 119709), (225, 93107), (235, 89145), (283, 74025), (315, 66505), (329, 63675), (423, 49525), (525, 39903), (705, 29715), (849, 24675), (987, 21225), (1175, 17829), (1415, 14805), (1575, 13301), (1645, 12735), (1981, 10575), (2115, 9905), (2547, 8225), (2961, 7075), (3525, 5943), (4245, 4935)]