21008872

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{863}}^1$

素因数の和:1065

約数の個数: 32

約数和(自身を含む): 41990400

約数和(自身を除く): 20981528

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 179, 358, 716, 863, 1432, 1726, 3043, 3452, 6086, 6904, 12172, 14671, 24344, 29342, 58684, 117368, 154477, 308954, 617908, 1235816, 2626109, 5252218, 10504436, 21008872]

約数ペア:

[(1, 21008872), (2, 10504436), (4, 5252218), (8, 2626109), (17, 1235816), (34, 617908), (68, 308954), (136, 154477), (179, 117368), (358, 58684), (716, 29342), (863, 24344), (1432, 14671), (1726, 12172), (3043, 6904), (3452, 6086)]