1557428740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{823}}^1\times {\mathrm{1931}}^1$

素因数の和:2777

約数の個数: 72

約数和(自身を含む): 3811171392

約数和(自身を除く): 2253742652

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 823, 980, 1646, 1931, 3292, 3862, 4115, 5761, 7724, 8230, 9655, 11522, 13517, 16460, 19310, 23044, 27034, 28805, 38620, 40327, 54068, 57610, 67585, 80654, 94619, 115220, 135170, 161308, 189238, 201635, 270340, 378476, 403270, 473095, 806540, 946190, 1589213, 1892380, 3178426, 6356852, 7946065, 11124491, 15892130, 22248982, 31784260, 44497964, 55622455, 77871437, 111244910, 155742874, 222489820, 311485748, 389357185, 778714370, 1557428740]

約数ペア:

[(1, 1557428740), (2, 778714370), (4, 389357185), (5, 311485748), (7, 222489820), (10, 155742874), (14, 111244910), (20, 77871437), (28, 55622455), (35, 44497964), (49, 31784260), (70, 22248982), (98, 15892130), (140, 11124491), (196, 7946065), (245, 6356852), (490, 3178426), (823, 1892380), (980, 1589213), (1646, 946190), (1931, 806540), (3292, 473095), (3862, 403270), (4115, 378476), (5761, 270340), (7724, 201635), (8230, 189238), (9655, 161308), (11522, 135170), (13517, 115220), (16460, 94619), (19310, 80654), (23044, 67585), (27034, 57610), (28805, 54068), (38620, 40327)]