20775645

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^2$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 42251040

約数和(自身を除く): 21475395

約数列:

[1, 3, 5, 9, 11, 15, 19, 33, 45, 47, 55, 57, 95, 99, 141, 165, 171, 209, 235, 285, 423, 495, 517, 627, 705, 855, 893, 1045, 1551, 1881, 2115, 2209, 2585, 2679, 3135, 4465, 4653, 6627, 7755, 8037, 9405, 9823, 11045, 13395, 19881, 23265, 24299, 29469, 33135, 40185, 41971, 49115, 72897, 88407, 99405, 121495, 125913, 147345, 209855, 218691, 364485, 377739, 442035, 461681, 629565, 1093455, 1385043, 1888695, 2308405, 4155129, 6925215, 20775645]

約数ペア:

[(1, 20775645), (3, 6925215), (5, 4155129), (9, 2308405), (11, 1888695), (15, 1385043), (19, 1093455), (33, 629565), (45, 461681), (47, 442035), (55, 377739), (57, 364485), (95, 218691), (99, 209855), (141, 147345), (165, 125913), (171, 121495), (209, 99405), (235, 88407), (285, 72897), (423, 49115), (495, 41971), (517, 40185), (627, 33135), (705, 29469), (855, 24299), (893, 23265), (1045, 19881), (1551, 13395), (1881, 11045), (2115, 9823), (2209, 9405), (2585, 8037), (2679, 7755), (3135, 6627), (4465, 4653)]