401214140

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1\times {\mathrm{1289}}^1$

素因数の和:1574

約数の個数: 48

約数和(自身を含む): 858211200

約数和(自身を除く): 456997060

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 197, 316, 394, 395, 788, 790, 985, 1289, 1580, 1970, 2578, 3940, 5156, 6445, 12890, 15563, 25780, 31126, 62252, 77815, 101831, 155630, 203662, 253933, 311260, 407324, 507866, 509155, 1015732, 1018310, 1269665, 2036620, 2539330, 5078660, 20060707, 40121414, 80242828, 100303535, 200607070, 401214140]

約数ペア:

[(1, 401214140), (2, 200607070), (4, 100303535), (5, 80242828), (10, 40121414), (20, 20060707), (79, 5078660), (158, 2539330), (197, 2036620), (316, 1269665), (394, 1018310), (395, 1015732), (788, 509155), (790, 507866), (985, 407324), (1289, 311260), (1580, 253933), (1970, 203662), (2578, 155630), (3940, 101831), (5156, 77815), (6445, 62252), (12890, 31126), (15563, 25780)]