19890561

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{547}}^1$

素因数の和:621

約数の個数: 32

約数和(自身を含む): 30302208

約数和(自身を除く): 10411647

約数列:

[1, 3, 17, 23, 31, 51, 69, 93, 391, 527, 547, 713, 1173, 1581, 1641, 2139, 9299, 12121, 12581, 16957, 27897, 36363, 37743, 50871, 213877, 288269, 390011, 641631, 864807, 1170033, 6630187, 19890561]

約数ペア:

[(1, 19890561), (3, 6630187), (17, 1170033), (23, 864807), (31, 641631), (51, 390011), (69, 288269), (93, 213877), (391, 50871), (527, 37743), (547, 36363), (713, 27897), (1173, 16957), (1581, 12581), (1641, 12121), (2139, 9299)]