19813557

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 29122560

約数和(自身を除く): 9309003

約数列:

[1, 3, 23, 31, 59, 69, 93, 157, 177, 471, 713, 1357, 1829, 2139, 3611, 4071, 4867, 5487, 9263, 10833, 14601, 27789, 42067, 111941, 126201, 213049, 287153, 335823, 639147, 861459, 6604519, 19813557]

約数ペア:

[(1, 19813557), (3, 6604519), (23, 861459), (31, 639147), (59, 335823), (69, 287153), (93, 213049), (157, 126201), (177, 111941), (471, 42067), (713, 27789), (1357, 14601), (1829, 10833), (2139, 9263), (3611, 5487), (4071, 4867)]