21265845

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:170

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17441355

約数列:

[1, 3, 5, 15, 19, 29, 31, 57, 83, 87, 93, 95, 145, 155, 249, 285, 415, 435, 465, 551, 589, 899, 1245, 1577, 1653, 1767, 2407, 2573, 2697, 2755, 2945, 4495, 4731, 7221, 7719, 7885, 8265, 8835, 12035, 12865, 13485, 17081, 23655, 36105, 38595, 45733, 48887, 51243, 74617, 85405, 137199, 146661, 223851, 228665, 244435, 256215, 373085, 685995, 733305, 1119255, 1417723, 4253169, 7088615, 21265845]

約数ペア:

[(1, 21265845), (3, 7088615), (5, 4253169), (15, 1417723), (19, 1119255), (29, 733305), (31, 685995), (57, 373085), (83, 256215), (87, 244435), (93, 228665), (95, 223851), (145, 146661), (155, 137199), (249, 85405), (285, 74617), (415, 51243), (435, 48887), (465, 45733), (551, 38595), (589, 36105), (899, 23655), (1245, 17081), (1577, 13485), (1653, 12865), (1767, 12035), (2407, 8835), (2573, 8265), (2697, 7885), (2755, 7719), (2945, 7221), (4495, 4731)]