21520504

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{229}}^1\times {\mathrm{691}}^1$

素因数の和:943

約数の個数: 32

約数和(自身を含む): 42973200

約数和(自身を除く): 21452696

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 229, 458, 691, 916, 1382, 1832, 2764, 3893, 5528, 7786, 11747, 15572, 23494, 31144, 46988, 93976, 158239, 316478, 632956, 1265912, 2690063, 5380126, 10760252, 21520504]

約数ペア:

[(1, 21520504), (2, 10760252), (4, 5380126), (8, 2690063), (17, 1265912), (34, 632956), (68, 316478), (136, 158239), (229, 93976), (458, 46988), (691, 31144), (916, 23494), (1382, 15572), (1832, 11747), (2764, 7786), (3893, 5528)]