640349284

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{461}}^1$

素因数の和:676

約数の個数: 48

約数和(自身を含む): 1171691136

約数和(自身を除く): 531341852

約数列:

[1, 2, 4, 67, 71, 73, 134, 142, 146, 268, 284, 292, 461, 922, 1844, 4757, 4891, 5183, 9514, 9782, 10366, 19028, 19564, 20732, 30887, 32731, 33653, 61774, 65462, 67306, 123548, 130924, 134612, 347261, 694522, 1389044, 2192977, 2254751, 2389363, 4385954, 4509502, 4778726, 8771908, 9019004, 9557452, 160087321, 320174642, 640349284]

約数ペア:

[(1, 640349284), (2, 320174642), (4, 160087321), (67, 9557452), (71, 9019004), (73, 8771908), (134, 4778726), (142, 4509502), (146, 4385954), (268, 2389363), (284, 2254751), (292, 2192977), (461, 1389044), (922, 694522), (1844, 347261), (4757, 134612), (4891, 130924), (5183, 123548), (9514, 67306), (9782, 65462), (10366, 61774), (19028, 33653), (19564, 32731), (20732, 30887)]