21281505

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^2\times {\mathrm{241}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 40470144

約数和(自身を除く): 19188639

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 87, 105, 145, 203, 241, 435, 609, 723, 841, 1015, 1205, 1687, 2523, 3045, 3615, 4205, 5061, 5887, 6989, 8435, 12615, 17661, 20967, 25305, 29435, 34945, 48923, 88305, 104835, 146769, 202681, 244615, 608043, 733845, 1013405, 1418767, 3040215, 4256301, 7093835, 21281505]

約数ペア:

[(1, 21281505), (3, 7093835), (5, 4256301), (7, 3040215), (15, 1418767), (21, 1013405), (29, 733845), (35, 608043), (87, 244615), (105, 202681), (145, 146769), (203, 104835), (241, 88305), (435, 48923), (609, 34945), (723, 29435), (841, 25305), (1015, 20967), (1205, 17661), (1687, 12615), (2523, 8435), (3045, 6989), (3615, 5887), (4205, 5061)]