21000485075

素因数分解:

$5^2\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{229}}^1\times {\mathrm{787}}^1$

素因数の和:1164

約数の個数: 48

約数和(自身を含む): 26968512000

約数和(自身を除く): 5968026925

約数列:

[1, 5, 25, 59, 79, 229, 295, 395, 787, 1145, 1475, 1975, 3935, 4661, 5725, 13511, 18091, 19675, 23305, 46433, 62173, 67555, 90455, 116525, 180223, 232165, 310865, 337775, 452275, 901115, 1067369, 1160825, 1554325, 3668207, 4505575, 5336845, 10633157, 14237617, 18341035, 26684225, 53165785, 71188085, 91705175, 265828925, 355940425, 840019403, 4200097015, 21000485075]

約数ペア:

[(1, 21000485075), (5, 4200097015), (25, 840019403), (59, 355940425), (79, 265828925), (229, 91705175), (295, 71188085), (395, 53165785), (787, 26684225), (1145, 18341035), (1475, 14237617), (1975, 10633157), (3935, 5336845), (4661, 4505575), (5725, 3668207), (13511, 1554325), (18091, 1160825), (19675, 1067369), (23305, 901115), (46433, 452275), (62173, 337775), (67555, 310865), (90455, 232165), (116525, 180223)]