21706672

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1321}}^1$

素因数の和:1421

約数の個数: 40

約数和(自身を含む): 45899840

約数和(自身を除く): 24193168

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 79, 104, 158, 208, 316, 632, 1027, 1264, 1321, 2054, 2642, 4108, 5284, 8216, 10568, 16432, 17173, 21136, 34346, 68692, 104359, 137384, 208718, 274768, 417436, 834872, 1356667, 1669744, 2713334, 5426668, 10853336, 21706672]

約数ペア:

[(1, 21706672), (2, 10853336), (4, 5426668), (8, 2713334), (13, 1669744), (16, 1356667), (26, 834872), (52, 417436), (79, 274768), (104, 208718), (158, 137384), (208, 104359), (316, 68692), (632, 34346), (1027, 21136), (1264, 17173), (1321, 16432), (2054, 10568), (2642, 8216), (4108, 5284)]