51380420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:182

約数の個数: 144

約数和(自身を含む): 140096880

約数和(自身を除く): 88716460

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 37, 49, 52, 65, 70, 74, 91, 98, 109, 130, 140, 148, 182, 185, 196, 218, 245, 259, 260, 364, 370, 436, 455, 481, 490, 518, 545, 637, 740, 763, 910, 962, 980, 1036, 1090, 1274, 1295, 1417, 1526, 1813, 1820, 1924, 2180, 2405, 2548, 2590, 2834, 3052, 3185, 3367, 3626, 3815, 4033, 4810, 5180, 5341, 5668, 6370, 6734, 7085, 7252, 7630, 8066, 9065, 9620, 9919, 10682, 12740, 13468, 14170, 15260, 16132, 16835, 18130, 19838, 20165, 21364, 23569, 26705, 28231, 28340, 33670, 36260, 39676, 40330, 47138, 49595, 52429, 53410, 56462, 67340, 69433, 80660, 94276, 99190, 104858, 106820, 112924, 117845, 138866, 141155, 197617, 198380, 209716, 235690, 262145, 277732, 282310, 347165, 367003, 395234, 471380, 524290, 564620, 694330, 734006, 790468, 988085, 1048580, 1388660, 1468012, 1835015, 1976170, 2569021, 3670030, 3952340, 5138042, 7340060, 10276084, 12845105, 25690210, 51380420]

約数ペア:

[(1, 51380420), (2, 25690210), (4, 12845105), (5, 10276084), (7, 7340060), (10, 5138042), (13, 3952340), (14, 3670030), (20, 2569021), (26, 1976170), (28, 1835015), (35, 1468012), (37, 1388660), (49, 1048580), (52, 988085), (65, 790468), (70, 734006), (74, 694330), (91, 564620), (98, 524290), (109, 471380), (130, 395234), (140, 367003), (148, 347165), (182, 282310), (185, 277732), (196, 262145), (218, 235690), (245, 209716), (259, 198380), (260, 197617), (364, 141155), (370, 138866), (436, 117845), (455, 112924), (481, 106820), (490, 104858), (518, 99190), (545, 94276), (637, 80660), (740, 69433), (763, 67340), (910, 56462), (962, 53410), (980, 52429), (1036, 49595), (1090, 47138), (1274, 40330), (1295, 39676), (1417, 36260), (1526, 33670), (1813, 28340), (1820, 28231), (1924, 26705), (2180, 23569), (2405, 21364), (2548, 20165), (2590, 19838), (2834, 18130), (3052, 16835), (3185, 16132), (3367, 15260), (3626, 14170), (3815, 13468), (4033, 12740), (4810, 10682), (5180, 9919), (5341, 9620), (5668, 9065), (6370, 8066), (6734, 7630), (7085, 7252)]