21991580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2063}}^1$

素因数の和:2126

約数の個数: 48

約数和(自身を含む): 50972544

約数和(自身を除く): 28980964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 52, 65, 82, 130, 164, 205, 260, 410, 533, 820, 1066, 2063, 2132, 2665, 4126, 5330, 8252, 10315, 10660, 20630, 26819, 41260, 53638, 84583, 107276, 134095, 169166, 268190, 338332, 422915, 536380, 845830, 1099579, 1691660, 2199158, 4398316, 5497895, 10995790, 21991580]

約数ペア:

[(1, 21991580), (2, 10995790), (4, 5497895), (5, 4398316), (10, 2199158), (13, 1691660), (20, 1099579), (26, 845830), (41, 536380), (52, 422915), (65, 338332), (82, 268190), (130, 169166), (164, 134095), (205, 107276), (260, 84583), (410, 53638), (533, 41260), (820, 26819), (1066, 20630), (2063, 10660), (2132, 10315), (2665, 8252), (4126, 5330)]