19782495

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 37785600

約数和(自身を除く): 18003105

約数列:

[1, 3, 5, 9, 15, 27, 29, 31, 45, 87, 93, 135, 145, 155, 163, 261, 279, 435, 465, 489, 783, 815, 837, 899, 1305, 1395, 1467, 2445, 2697, 3915, 4185, 4401, 4495, 4727, 5053, 7335, 8091, 13485, 14181, 15159, 22005, 23635, 24273, 25265, 40455, 42543, 45477, 70905, 75795, 121365, 127629, 136431, 146537, 212715, 227385, 439611, 638145, 682155, 732685, 1318833, 2198055, 3956499, 6594165, 19782495]

約数ペア:

[(1, 19782495), (3, 6594165), (5, 3956499), (9, 2198055), (15, 1318833), (27, 732685), (29, 682155), (31, 638145), (45, 439611), (87, 227385), (93, 212715), (135, 146537), (145, 136431), (155, 127629), (163, 121365), (261, 75795), (279, 70905), (435, 45477), (465, 42543), (489, 40455), (783, 25265), (815, 24273), (837, 23635), (899, 22005), (1305, 15159), (1395, 14181), (1467, 13485), (2445, 8091), (2697, 7335), (3915, 5053), (4185, 4727), (4401, 4495)]