20378400

素因数分解:

$2^5\times 3^1\times 5^2\times 7^1\times {\mathrm{1213}}^1$

素因数の和:1243

約数の個数: 144

約数和(自身を含む): 75870144

約数和(自身を除く): 55491744

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 25, 28, 30, 32, 35, 40, 42, 48, 50, 56, 60, 70, 75, 80, 84, 96, 100, 105, 112, 120, 140, 150, 160, 168, 175, 200, 210, 224, 240, 280, 300, 336, 350, 400, 420, 480, 525, 560, 600, 672, 700, 800, 840, 1050, 1120, 1200, 1213, 1400, 1680, 2100, 2400, 2426, 2800, 3360, 3639, 4200, 4852, 5600, 6065, 7278, 8400, 8491, 9704, 12130, 14556, 16800, 16982, 18195, 19408, 24260, 25473, 29112, 30325, 33964, 36390, 38816, 42455, 48520, 50946, 58224, 60650, 67928, 72780, 84910, 90975, 97040, 101892, 116448, 121300, 127365, 135856, 145560, 169820, 181950, 194080, 203784, 212275, 242600, 254730, 271712, 291120, 339640, 363900, 407568, 424550, 485200, 509460, 582240, 636825, 679280, 727800, 815136, 849100, 970400, 1018920, 1273650, 1358560, 1455600, 1698200, 2037840, 2547300, 2911200, 3396400, 4075680, 5094600, 6792800, 10189200, 20378400]

約数ペア:

[(1, 20378400), (2, 10189200), (3, 6792800), (4, 5094600), (5, 4075680), (6, 3396400), (7, 2911200), (8, 2547300), (10, 2037840), (12, 1698200), (14, 1455600), (15, 1358560), (16, 1273650), (20, 1018920), (21, 970400), (24, 849100), (25, 815136), (28, 727800), (30, 679280), (32, 636825), (35, 582240), (40, 509460), (42, 485200), (48, 424550), (50, 407568), (56, 363900), (60, 339640), (70, 291120), (75, 271712), (80, 254730), (84, 242600), (96, 212275), (100, 203784), (105, 194080), (112, 181950), (120, 169820), (140, 145560), (150, 135856), (160, 127365), (168, 121300), (175, 116448), (200, 101892), (210, 97040), (224, 90975), (240, 84910), (280, 72780), (300, 67928), (336, 60650), (350, 58224), (400, 50946), (420, 48520), (480, 42455), (525, 38816), (560, 36390), (600, 33964), (672, 30325), (700, 29112), (800, 25473), (840, 24260), (1050, 19408), (1120, 18195), (1200, 16982), (1213, 16800), (1400, 14556), (1680, 12130), (2100, 9704), (2400, 8491), (2426, 8400), (2800, 7278), (3360, 6065), (3639, 5600), (4200, 4852)]