20153889

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{149}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 35568000

約数和(自身を除く): 15414111

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 113, 133, 149, 171, 339, 399, 447, 791, 1017, 1043, 1197, 1341, 2147, 2373, 2831, 3129, 6441, 7119, 8493, 9387, 15029, 16837, 19323, 19817, 25479, 45087, 50511, 59451, 117859, 135261, 151533, 178353, 319903, 353577, 959709, 1060731, 2239321, 2879127, 6717963, 20153889]

約数ペア:

[(1, 20153889), (3, 6717963), (7, 2879127), (9, 2239321), (19, 1060731), (21, 959709), (57, 353577), (63, 319903), (113, 178353), (133, 151533), (149, 135261), (171, 117859), (339, 59451), (399, 50511), (447, 45087), (791, 25479), (1017, 19817), (1043, 19323), (1197, 16837), (1341, 15029), (2147, 9387), (2373, 8493), (2831, 7119), (3129, 6441)]