396989720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{320153}}^1$

素因数の和:320195

約数の個数: 32

約数和(自身を含む): 922043520

約数和(自身を除く): 525053800

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 320153, 640306, 1280612, 1600765, 2561224, 3201530, 6403060, 9924743, 12806120, 19849486, 39698972, 49623715, 79397944, 99247430, 198494860, 396989720]

約数ペア:

[(1, 396989720), (2, 198494860), (4, 99247430), (5, 79397944), (8, 49623715), (10, 39698972), (20, 19849486), (31, 12806120), (40, 9924743), (62, 6403060), (124, 3201530), (155, 2561224), (248, 1600765), (310, 1280612), (620, 640306), (1240, 320153)]