640717785

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{3943}}^1$

素因数の和:4134

約数の個数: 48

約数和(自身を含む): 1166540544

約数和(自身を除く): 525822759

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 157, 207, 345, 471, 785, 1035, 1413, 2355, 3611, 3943, 7065, 10833, 11829, 18055, 19715, 32499, 35487, 54165, 59145, 90689, 162495, 177435, 272067, 453445, 619051, 816201, 1360335, 1857153, 3095255, 4081005, 5571459, 9285765, 14238173, 27857295, 42714519, 71190865, 128143557, 213572595, 640717785]

約数ペア:

[(1, 640717785), (3, 213572595), (5, 128143557), (9, 71190865), (15, 42714519), (23, 27857295), (45, 14238173), (69, 9285765), (115, 5571459), (157, 4081005), (207, 3095255), (345, 1857153), (471, 1360335), (785, 816201), (1035, 619051), (1413, 453445), (2355, 272067), (3611, 177435), (3943, 162495), (7065, 90689), (10833, 59145), (11829, 54165), (18055, 35487), (19715, 32499)]