21720168575

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{887}}^1\times {\mathrm{8231}}^1$

素因数の和:9152

約数の個数: 48

約数和(自身を含む): 32631911424

約数和(自身を除く): 10911742849

約数列:

[1, 5, 7, 17, 25, 35, 85, 119, 175, 425, 595, 887, 2975, 4435, 6209, 8231, 15079, 22175, 31045, 41155, 57617, 75395, 105553, 139927, 155225, 205775, 288085, 376975, 527765, 699635, 979489, 1440425, 2638825, 3498175, 4897445, 7300897, 24487225, 36504485, 51106279, 124115249, 182522425, 255531395, 620576245, 868806743, 1277656975, 3102881225, 4344033715, 21720168575]

約数ペア:

[(1, 21720168575), (5, 4344033715), (7, 3102881225), (17, 1277656975), (25, 868806743), (35, 620576245), (85, 255531395), (119, 182522425), (175, 124115249), (425, 51106279), (595, 36504485), (887, 24487225), (2975, 7300897), (4435, 4897445), (6209, 3498175), (8231, 2638825), (15079, 1440425), (22175, 979489), (31045, 699635), (41155, 527765), (57617, 376975), (75395, 288085), (105553, 205775), (139927, 155225)]