21305895

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2953}}^1$

素因数の和:3011

約数の個数: 32

約数和(自身を含む): 37716672

約数和(自身を除く): 16410777

約数列:

[1, 3, 5, 13, 15, 37, 39, 65, 111, 185, 195, 481, 555, 1443, 2405, 2953, 7215, 8859, 14765, 38389, 44295, 109261, 115167, 191945, 327783, 546305, 575835, 1420393, 1638915, 4261179, 7101965, 21305895]

約数ペア:

[(1, 21305895), (3, 7101965), (5, 4261179), (13, 1638915), (15, 1420393), (37, 575835), (39, 546305), (65, 327783), (111, 191945), (185, 115167), (195, 109261), (481, 44295), (555, 38389), (1443, 14765), (2405, 8859), (2953, 7215)]