20561520

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12239}}^1$

素因数の和:12262

約数の個数: 80

約数和(自身を含む): 72852480

約数和(自身を除く): 52290960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12239, 24478, 36717, 48956, 61195, 73434, 85673, 97912, 122390, 146868, 171346, 183585, 195824, 244780, 257019, 293736, 342692, 367170, 428365, 489560, 514038, 587472, 685384, 734340, 856730, 979120, 1028076, 1285095, 1370768, 1468680, 1713460, 2056152, 2570190, 2937360, 3426920, 4112304, 5140380, 6853840, 10280760, 20561520]

約数ペア:

[(1, 20561520), (2, 10280760), (3, 6853840), (4, 5140380), (5, 4112304), (6, 3426920), (7, 2937360), (8, 2570190), (10, 2056152), (12, 1713460), (14, 1468680), (15, 1370768), (16, 1285095), (20, 1028076), (21, 979120), (24, 856730), (28, 734340), (30, 685384), (35, 587472), (40, 514038), (42, 489560), (48, 428365), (56, 367170), (60, 342692), (70, 293736), (80, 257019), (84, 244780), (105, 195824), (112, 183585), (120, 171346), (140, 146868), (168, 122390), (210, 97912), (240, 85673), (280, 73434), (336, 61195), (420, 48956), (560, 36717), (840, 24478), (1680, 12239)]