21501753

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 38610432

約数和(自身を除く): 17108679

約数列:

[1, 3, 7, 13, 17, 21, 39, 41, 51, 91, 113, 119, 123, 221, 273, 287, 339, 357, 533, 663, 697, 791, 861, 1469, 1547, 1599, 1921, 2091, 2373, 3731, 4407, 4633, 4641, 4879, 5763, 9061, 10283, 11193, 13447, 13899, 14637, 24973, 27183, 30849, 32431, 40341, 60229, 63427, 74919, 78761, 97293, 174811, 180687, 190281, 236283, 421603, 524433, 551327, 1023893, 1264809, 1653981, 3071679, 7167251, 21501753]

約数ペア:

[(1, 21501753), (3, 7167251), (7, 3071679), (13, 1653981), (17, 1264809), (21, 1023893), (39, 551327), (41, 524433), (51, 421603), (91, 236283), (113, 190281), (119, 180687), (123, 174811), (221, 97293), (273, 78761), (287, 74919), (339, 63427), (357, 60229), (533, 40341), (663, 32431), (697, 30849), (791, 27183), (861, 24973), (1469, 14637), (1547, 13899), (1599, 13447), (1921, 11193), (2091, 10283), (2373, 9061), (3731, 5763), (4407, 4879), (4633, 4641)]