19917430

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{439}}^1$

素因数の和:808

約数の個数: 32

約数和(自身を含む): 38808000

約数和(自身を除く): 18890570

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 349, 439, 698, 878, 1745, 2195, 3490, 4390, 4537, 5707, 9074, 11414, 22685, 28535, 45370, 57070, 153211, 306422, 766055, 1532110, 1991743, 3983486, 9958715, 19917430]

約数ペア:

[(1, 19917430), (2, 9958715), (5, 3983486), (10, 1991743), (13, 1532110), (26, 766055), (65, 306422), (130, 153211), (349, 57070), (439, 45370), (698, 28535), (878, 22685), (1745, 11414), (2195, 9074), (3490, 5707), (4390, 4537)]