21318752

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7321}}^1$

素因数の和:7351

約数の個数: 48

約数和(自身を含む): 51664032

約数和(自身を除く): 30345280

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 7321, 14642, 29284, 51247, 58568, 95173, 102494, 117136, 190346, 204988, 234272, 380692, 409976, 666211, 761384, 819952, 1332422, 1522768, 1639904, 2664844, 3045536, 5329688, 10659376, 21318752]

約数ペア:

[(1, 21318752), (2, 10659376), (4, 5329688), (7, 3045536), (8, 2664844), (13, 1639904), (14, 1522768), (16, 1332422), (26, 819952), (28, 761384), (32, 666211), (52, 409976), (56, 380692), (91, 234272), (104, 204988), (112, 190346), (182, 117136), (208, 102494), (224, 95173), (364, 58568), (416, 51247), (728, 29284), (1456, 14642), (2912, 7321)]