21879780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{28051}}^1$

素因数の和:28076

約数の個数: 48

約数和(自身を含む): 65978304

約数和(自身を除く): 44098524

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, 28051, 56102, 84153, 112204, 140255, 168306, 280510, 336612, 364663, 420765, 561020, 729326, 841530, 1093989, 1458652, 1683060, 1823315, 2187978, 3646630, 4375956, 5469945, 7293260, 10939890, 21879780]

約数ペア:

[(1, 21879780), (2, 10939890), (3, 7293260), (4, 5469945), (5, 4375956), (6, 3646630), (10, 2187978), (12, 1823315), (13, 1683060), (15, 1458652), (20, 1093989), (26, 841530), (30, 729326), (39, 561020), (52, 420765), (60, 364663), (65, 336612), (78, 280510), (130, 168306), (156, 140255), (195, 112204), (260, 84153), (390, 56102), (780, 28051)]