205121520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{661}}^1$

素因数の和:1111

約数の個数: 120

約数和(自身を含む): 691509312

約数和(自身を除く): 486387792

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 431, 661, 720, 862, 1293, 1322, 1724, 1983, 2155, 2586, 2644, 3305, 3448, 3879, 3966, 4310, 5172, 5288, 5949, 6465, 6610, 6896, 7758, 7932, 8620, 9915, 10344, 10576, 11898, 12930, 13220, 15516, 15864, 17240, 19395, 19830, 20688, 23796, 25860, 26440, 29745, 31032, 31728, 34480, 38790, 39660, 47592, 51720, 52880, 59490, 62064, 77580, 79320, 95184, 103440, 118980, 155160, 158640, 237960, 284891, 310320, 475920, 569782, 854673, 1139564, 1424455, 1709346, 2279128, 2564019, 2848910, 3418692, 4273365, 4558256, 5128038, 5697820, 6837384, 8546730, 10256076, 11395640, 12820095, 13674768, 17093460, 20512152, 22791280, 25640190, 34186920, 41024304, 51280380, 68373840, 102560760, 205121520]

約数ペア:

[(1, 205121520), (2, 102560760), (3, 68373840), (4, 51280380), (5, 41024304), (6, 34186920), (8, 25640190), (9, 22791280), (10, 20512152), (12, 17093460), (15, 13674768), (16, 12820095), (18, 11395640), (20, 10256076), (24, 8546730), (30, 6837384), (36, 5697820), (40, 5128038), (45, 4558256), (48, 4273365), (60, 3418692), (72, 2848910), (80, 2564019), (90, 2279128), (120, 1709346), (144, 1424455), (180, 1139564), (240, 854673), (360, 569782), (431, 475920), (661, 310320), (720, 284891), (862, 237960), (1293, 158640), (1322, 155160), (1724, 118980), (1983, 103440), (2155, 95184), (2586, 79320), (2644, 77580), (3305, 62064), (3448, 59490), (3879, 52880), (3966, 51720), (4310, 47592), (5172, 39660), (5288, 38790), (5949, 34480), (6465, 31728), (6610, 31032), (6896, 29745), (7758, 26440), (7932, 25860), (8620, 23796), (9915, 20688), (10344, 19830), (10576, 19395), (11898, 17240), (12930, 15864), (13220, 15516)]