21356475

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2141}}^1$

素因数の和:2180

約数の個数: 48

約数和(自身を含む): 42497280

約数和(自身を除く): 21140805

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 95, 105, 133, 175, 285, 399, 475, 525, 665, 1425, 1995, 2141, 3325, 6423, 9975, 10705, 14987, 32115, 40679, 44961, 53525, 74935, 122037, 160575, 203395, 224805, 284753, 374675, 610185, 854259, 1016975, 1124025, 1423765, 3050925, 4271295, 7118825, 21356475]

約数ペア:

[(1, 21356475), (3, 7118825), (5, 4271295), (7, 3050925), (15, 1423765), (19, 1124025), (21, 1016975), (25, 854259), (35, 610185), (57, 374675), (75, 284753), (95, 224805), (105, 203395), (133, 160575), (175, 122037), (285, 74935), (399, 53525), (475, 44961), (525, 40679), (665, 32115), (1425, 14987), (1995, 10705), (2141, 9975), (3325, 6423)]