19984987

素因数分解:

${\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{569}}^1$

素因数の和:714

約数の個数: 16

約数和(自身を含む): 22763520

約数和(自身を除く): 2778533

約数列:

[1, 11, 31, 103, 341, 569, 1133, 3193, 6259, 17639, 35123, 58607, 194029, 644677, 1816817, 19984987]

約数ペア:

[(1, 19984987), (11, 1816817), (31, 644677), (103, 194029), (341, 58607), (569, 35123), (1133, 17639), (3193, 6259)]