15678780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20101}}^1$

素因数の和:20126

約数の個数: 48

約数和(自身を含む): 47279904

約数和(自身を除く): 31601124

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, 20101, 40202, 60303, 80404, 100505, 120606, 201010, 241212, 261313, 301515, 402020, 522626, 603030, 783939, 1045252, 1206060, 1306565, 1567878, 2613130, 3135756, 3919695, 5226260, 7839390, 15678780]

約数ペア:

[(1, 15678780), (2, 7839390), (3, 5226260), (4, 3919695), (5, 3135756), (6, 2613130), (10, 1567878), (12, 1306565), (13, 1206060), (15, 1045252), (20, 783939), (26, 603030), (30, 522626), (39, 402020), (52, 301515), (60, 261313), (65, 241212), (78, 201010), (130, 120606), (156, 100505), (195, 80404), (260, 60303), (390, 40202), (780, 20101)]