21606780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27701}}^1$

素因数の和:27726

約数の個数: 48

約数和(自身を含む): 65155104

約数和(自身を除く): 43548324

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27701, 55402, 83103, 110804, 138505, 166206, 277010, 332412, 360113, 415515, 554020, 720226, 831030, 1080339, 1440452, 1662060, 1800565, 2160678, 3601130, 4321356, 5401695, 7202260, 10803390, 21606780]

約数ペア:

[(1, 21606780), (2, 10803390), (3, 7202260), (4, 5401695), (5, 4321356), (6, 3601130), (10, 2160678), (12, 1800565), (13, 1662060), (15, 1440452), (20, 1080339), (26, 831030), (30, 720226), (39, 554020), (52, 415515), (60, 360113), (65, 332412), (78, 277010), (130, 166206), (156, 138505), (195, 110804), (260, 83103), (390, 55402), (780, 27701)]