19985173

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{491}}^1$

素因数の和:636

約数の個数: 16

約数和(自身を含む): 22482432

約数和(自身を除く): 2497259

約数列:

[1, 13, 31, 101, 403, 491, 1313, 3131, 6383, 15221, 40703, 49591, 197873, 644683, 1537321, 19985173]

約数ペア:

[(1, 19985173), (13, 1537321), (31, 644683), (101, 197873), (403, 49591), (491, 40703), (1313, 15221), (3131, 6383)]