15721960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^2\times {\mathrm{409}}^1$

素因数の和:482

約数の個数: 48

約数和(自身を含む): 36641700

約数和(自身を除く): 20919740

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 409, 620, 818, 961, 1240, 1636, 1922, 2045, 3272, 3844, 4090, 4805, 7688, 8180, 9610, 12679, 16360, 19220, 25358, 38440, 50716, 63395, 101432, 126790, 253580, 393049, 507160, 786098, 1572196, 1965245, 3144392, 3930490, 7860980, 15721960]

約数ペア:

[(1, 15721960), (2, 7860980), (4, 3930490), (5, 3144392), (8, 1965245), (10, 1572196), (20, 786098), (31, 507160), (40, 393049), (62, 253580), (124, 126790), (155, 101432), (248, 63395), (310, 50716), (409, 38440), (620, 25358), (818, 19220), (961, 16360), (1240, 12679), (1636, 9610), (1922, 8180), (2045, 7688), (3272, 4805), (3844, 4090)]