19937775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^3$

素因数の和:74

約数の個数: 72

約数和(自身を含む): 39250960

約数和(自身を除く): 19313185

約数列:

[1, 3, 5, 11, 13, 15, 25, 33, 39, 55, 65, 75, 121, 143, 165, 169, 195, 275, 325, 363, 429, 507, 605, 715, 825, 845, 975, 1573, 1815, 1859, 2145, 2197, 2535, 3025, 3575, 4225, 4719, 5577, 6591, 7865, 9075, 9295, 10725, 10985, 12675, 20449, 23595, 24167, 27885, 32955, 39325, 46475, 54925, 61347, 72501, 102245, 117975, 120835, 139425, 164775, 265837, 306735, 362505, 511225, 604175, 797511, 1329185, 1533675, 1812525, 3987555, 6645925, 19937775]

約数ペア:

[(1, 19937775), (3, 6645925), (5, 3987555), (11, 1812525), (13, 1533675), (15, 1329185), (25, 797511), (33, 604175), (39, 511225), (55, 362505), (65, 306735), (75, 265837), (121, 164775), (143, 139425), (165, 120835), (169, 117975), (195, 102245), (275, 72501), (325, 61347), (363, 54925), (429, 46475), (507, 39325), (605, 32955), (715, 27885), (825, 24167), (845, 23595), (975, 20449), (1573, 12675), (1815, 10985), (1859, 10725), (2145, 9295), (2197, 9075), (2535, 7865), (3025, 6591), (3575, 5577), (4225, 4719)]