1291220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 3241728

約数和(自身を除く): 1950508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 401, 460, 644, 802, 805, 1604, 1610, 2005, 2807, 3220, 4010, 5614, 8020, 9223, 11228, 14035, 18446, 28070, 36892, 46115, 56140, 64561, 92230, 129122, 184460, 258244, 322805, 645610, 1291220]

約数ペア:

[(1, 1291220), (2, 645610), (4, 322805), (5, 258244), (7, 184460), (10, 129122), (14, 92230), (20, 64561), (23, 56140), (28, 46115), (35, 36892), (46, 28070), (70, 18446), (92, 14035), (115, 11228), (140, 9223), (161, 8020), (230, 5614), (322, 4010), (401, 3220), (460, 2807), (644, 2005), (802, 1610), (805, 1604)]