199721015

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2963}}^1$

素因数の和:3059

約数の個数: 32

約数和(自身を含む): 277857216

約数和(自身を除く): 78136201

約数列:

[1, 5, 13, 17, 61, 65, 85, 221, 305, 793, 1037, 1105, 2963, 3965, 5185, 13481, 14815, 38519, 50371, 67405, 180743, 192595, 251855, 654823, 903715, 2349659, 3072631, 3274115, 11748295, 15363155, 39944203, 199721015]

約数ペア:

[(1, 199721015), (5, 39944203), (13, 15363155), (17, 11748295), (61, 3274115), (65, 3072631), (85, 2349659), (221, 903715), (305, 654823), (793, 251855), (1037, 192595), (1105, 180743), (2963, 67405), (3965, 50371), (5185, 38519), (13481, 14815)]