778489990

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:449

約数の個数: 64

約数和(自身を含む): 1474704000

約数和(自身を除く): 696214010

約数列:

[1, 2, 5, 10, 37, 74, 97, 109, 185, 194, 199, 218, 370, 398, 485, 545, 970, 995, 1090, 1990, 3589, 4033, 7178, 7363, 8066, 10573, 14726, 17945, 19303, 20165, 21146, 21691, 35890, 36815, 38606, 40330, 43382, 52865, 73630, 96515, 105730, 108455, 193030, 216910, 391201, 714211, 782402, 802567, 1428422, 1605134, 1956005, 2104027, 3571055, 3912010, 4012835, 4208054, 7142110, 8025670, 10520135, 21040270, 77848999, 155697998, 389244995, 778489990]

約数ペア:

[(1, 778489990), (2, 389244995), (5, 155697998), (10, 77848999), (37, 21040270), (74, 10520135), (97, 8025670), (109, 7142110), (185, 4208054), (194, 4012835), (199, 3912010), (218, 3571055), (370, 2104027), (398, 1956005), (485, 1605134), (545, 1428422), (970, 802567), (995, 782402), (1090, 714211), (1990, 391201), (3589, 216910), (4033, 193030), (7178, 108455), (7363, 105730), (8066, 96515), (10573, 73630), (14726, 52865), (17945, 43382), (19303, 40330), (20165, 38606), (21146, 36815), (21691, 35890)]