21284620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{587}}^1$

素因数の和:647

約数の個数: 72

約数和(自身を含む): 53491536

約数和(自身を除く): 32206916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 587, 740, 980, 1036, 1174, 1295, 1813, 2348, 2590, 2935, 3626, 4109, 5180, 5870, 7252, 8218, 9065, 11740, 16436, 18130, 20545, 21719, 28763, 36260, 41090, 43438, 57526, 82180, 86876, 108595, 115052, 143815, 152033, 217190, 287630, 304066, 434380, 575260, 608132, 760165, 1064231, 1520330, 2128462, 3040660, 4256924, 5321155, 10642310, 21284620]

約数ペア:

[(1, 21284620), (2, 10642310), (4, 5321155), (5, 4256924), (7, 3040660), (10, 2128462), (14, 1520330), (20, 1064231), (28, 760165), (35, 608132), (37, 575260), (49, 434380), (70, 304066), (74, 287630), (98, 217190), (140, 152033), (148, 143815), (185, 115052), (196, 108595), (245, 86876), (259, 82180), (370, 57526), (490, 43438), (518, 41090), (587, 36260), (740, 28763), (980, 21719), (1036, 20545), (1174, 18130), (1295, 16436), (1813, 11740), (2348, 9065), (2590, 8218), (2935, 7252), (3626, 5870), (4109, 5180)]