209401745

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{349}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 306432000

約数和(自身を除く): 97030255

約数列:

[1, 5, 7, 31, 35, 49, 79, 155, 217, 245, 349, 395, 553, 1085, 1519, 1745, 2443, 2449, 2765, 3871, 7595, 10819, 12215, 12245, 17101, 17143, 19355, 27571, 54095, 75733, 85505, 85715, 120001, 137855, 192997, 378665, 530131, 600005, 854701, 964985, 1350979, 2650655, 4273505, 5982907, 6754895, 29914535, 41880349, 209401745]

約数ペア:

[(1, 209401745), (5, 41880349), (7, 29914535), (31, 6754895), (35, 5982907), (49, 4273505), (79, 2650655), (155, 1350979), (217, 964985), (245, 854701), (349, 600005), (395, 530131), (553, 378665), (1085, 192997), (1519, 137855), (1745, 120001), (2443, 85715), (2449, 85505), (2765, 75733), (3871, 54095), (7595, 27571), (10819, 19355), (12215, 17143), (12245, 17101)]