20881000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:204

約数の個数: 128

約数和(自身を含む): 59155200

約数和(自身を除く): 38274200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 25, 28, 35, 38, 40, 50, 56, 70, 76, 95, 100, 125, 133, 140, 152, 157, 175, 190, 200, 250, 266, 280, 314, 350, 380, 475, 500, 532, 628, 665, 700, 760, 785, 875, 950, 1000, 1064, 1099, 1256, 1330, 1400, 1570, 1750, 1900, 2198, 2375, 2660, 2983, 3140, 3325, 3500, 3800, 3925, 4396, 4750, 5320, 5495, 5966, 6280, 6650, 7000, 7850, 8792, 9500, 10990, 11932, 13300, 14915, 15700, 16625, 19000, 19625, 20881, 21980, 23864, 26600, 27475, 29830, 31400, 33250, 39250, 41762, 43960, 54950, 59660, 66500, 74575, 78500, 83524, 104405, 109900, 119320, 133000, 137375, 149150, 157000, 167048, 208810, 219800, 274750, 298300, 372875, 417620, 522025, 549500, 596600, 745750, 835240, 1044050, 1099000, 1491500, 2088100, 2610125, 2983000, 4176200, 5220250, 10440500, 20881000]

約数ペア:

[(1, 20881000), (2, 10440500), (4, 5220250), (5, 4176200), (7, 2983000), (8, 2610125), (10, 2088100), (14, 1491500), (19, 1099000), (20, 1044050), (25, 835240), (28, 745750), (35, 596600), (38, 549500), (40, 522025), (50, 417620), (56, 372875), (70, 298300), (76, 274750), (95, 219800), (100, 208810), (125, 167048), (133, 157000), (140, 149150), (152, 137375), (157, 133000), (175, 119320), (190, 109900), (200, 104405), (250, 83524), (266, 78500), (280, 74575), (314, 66500), (350, 59660), (380, 54950), (475, 43960), (500, 41762), (532, 39250), (628, 33250), (665, 31400), (700, 29830), (760, 27475), (785, 26600), (875, 23864), (950, 21980), (1000, 20881), (1064, 19625), (1099, 19000), (1256, 16625), (1330, 15700), (1400, 14915), (1570, 13300), (1750, 11932), (1900, 10990), (2198, 9500), (2375, 8792), (2660, 7850), (2983, 7000), (3140, 6650), (3325, 6280), (3500, 5966), (3800, 5495), (3925, 5320), (4396, 4750)]