20409675

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{173}}^1$

素因数の和:221

約数の個数: 72

約数和(自身を含む): 40174512

約数和(自身を除く): 19764837

約数列:

[1, 3, 5, 11, 13, 15, 25, 33, 39, 55, 65, 75, 121, 143, 165, 173, 195, 275, 325, 363, 429, 519, 605, 715, 825, 865, 975, 1573, 1815, 1903, 2145, 2249, 2595, 3025, 3575, 4325, 4719, 5709, 6747, 7865, 9075, 9515, 10725, 11245, 12975, 20933, 23595, 24739, 28545, 33735, 39325, 47575, 56225, 62799, 74217, 104665, 117975, 123695, 142725, 168675, 272129, 313995, 371085, 523325, 618475, 816387, 1360645, 1569975, 1855425, 4081935, 6803225, 20409675]

約数ペア:

[(1, 20409675), (3, 6803225), (5, 4081935), (11, 1855425), (13, 1569975), (15, 1360645), (25, 816387), (33, 618475), (39, 523325), (55, 371085), (65, 313995), (75, 272129), (121, 168675), (143, 142725), (165, 123695), (173, 117975), (195, 104665), (275, 74217), (325, 62799), (363, 56225), (429, 47575), (519, 39325), (605, 33735), (715, 28545), (825, 24739), (865, 23595), (975, 20933), (1573, 12975), (1815, 11245), (1903, 10725), (2145, 9515), (2249, 9075), (2595, 7865), (3025, 6747), (3575, 5709), (4325, 4719)]