668819620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{251}}^1\times {\mathrm{2719}}^1$

素因数の和:2993

約数の個数: 72

約数和(自身を含む): 1640943360

約数和(自身を除く): 972123740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 251, 490, 502, 980, 1004, 1255, 1757, 2510, 2719, 3514, 5020, 5438, 7028, 8785, 10876, 12299, 13595, 17570, 19033, 24598, 27190, 35140, 38066, 49196, 54380, 61495, 76132, 95165, 122990, 133231, 190330, 245980, 266462, 380660, 532924, 666155, 682469, 1332310, 1364938, 2664620, 2729876, 3412345, 4777283, 6824690, 9554566, 13649380, 19109132, 23886415, 33440981, 47772830, 66881962, 95545660, 133763924, 167204905, 334409810, 668819620]

約数ペア:

[(1, 668819620), (2, 334409810), (4, 167204905), (5, 133763924), (7, 95545660), (10, 66881962), (14, 47772830), (20, 33440981), (28, 23886415), (35, 19109132), (49, 13649380), (70, 9554566), (98, 6824690), (140, 4777283), (196, 3412345), (245, 2729876), (251, 2664620), (490, 1364938), (502, 1332310), (980, 682469), (1004, 666155), (1255, 532924), (1757, 380660), (2510, 266462), (2719, 245980), (3514, 190330), (5020, 133231), (5438, 122990), (7028, 95165), (8785, 76132), (10876, 61495), (12299, 54380), (13595, 49196), (17570, 38066), (19033, 35140), (24598, 27190)]