21888945

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:143

約数の個数: 96

約数和(自身を含む): 45287424

約数和(自身を除く): 23398479

約数列:

[1, 3, 5, 9, 13, 15, 17, 31, 39, 45, 51, 65, 71, 85, 93, 117, 153, 155, 195, 213, 221, 255, 279, 355, 403, 465, 527, 585, 639, 663, 765, 923, 1065, 1105, 1207, 1209, 1395, 1581, 1989, 2015, 2201, 2635, 2769, 3195, 3315, 3621, 3627, 4615, 4743, 6035, 6045, 6603, 6851, 7905, 8307, 9945, 10863, 11005, 13845, 15691, 18105, 18135, 19809, 20553, 23715, 28613, 33015, 34255, 37417, 41535, 47073, 54315, 61659, 78455, 85839, 99045, 102765, 112251, 141219, 143065, 187085, 235365, 257517, 308295, 336753, 429195, 486421, 561255, 706095, 1287585, 1459263, 1683765, 2432105, 4377789, 7296315, 21888945]

約数ペア:

[(1, 21888945), (3, 7296315), (5, 4377789), (9, 2432105), (13, 1683765), (15, 1459263), (17, 1287585), (31, 706095), (39, 561255), (45, 486421), (51, 429195), (65, 336753), (71, 308295), (85, 257517), (93, 235365), (117, 187085), (153, 143065), (155, 141219), (195, 112251), (213, 102765), (221, 99045), (255, 85839), (279, 78455), (355, 61659), (403, 54315), (465, 47073), (527, 41535), (585, 37417), (639, 34255), (663, 33015), (765, 28613), (923, 23715), (1065, 20553), (1105, 19809), (1207, 18135), (1209, 18105), (1395, 15691), (1581, 13845), (1989, 11005), (2015, 10863), (2201, 9945), (2635, 8307), (2769, 7905), (3195, 6851), (3315, 6603), (3621, 6045), (3627, 6035), (4615, 4743)]