20957760

素因数分解:

$2^6\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{383}}^1$

素因数の和:425

約数の個数: 168

約数和(自身を含む): 76078080

約数和(自身を除く): 55120320

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 32, 36, 38, 40, 45, 48, 57, 60, 64, 72, 76, 80, 90, 95, 96, 114, 120, 144, 152, 160, 171, 180, 190, 192, 228, 240, 285, 288, 304, 320, 342, 360, 380, 383, 456, 480, 570, 576, 608, 684, 720, 760, 766, 855, 912, 960, 1140, 1149, 1216, 1368, 1440, 1520, 1532, 1710, 1824, 1915, 2280, 2298, 2736, 2880, 3040, 3064, 3420, 3447, 3648, 3830, 4560, 4596, 5472, 5745, 6080, 6128, 6840, 6894, 7277, 7660, 9120, 9192, 10944, 11490, 12256, 13680, 13788, 14554, 15320, 17235, 18240, 18384, 21831, 22980, 24512, 27360, 27576, 29108, 30640, 34470, 36385, 36768, 43662, 45960, 54720, 55152, 58216, 61280, 65493, 68940, 72770, 73536, 87324, 91920, 109155, 110304, 116432, 122560, 130986, 137880, 145540, 174648, 183840, 218310, 220608, 232864, 261972, 275760, 291080, 327465, 349296, 367680, 436620, 465728, 523944, 551520, 582160, 654930, 698592, 873240, 1047888, 1103040, 1164320, 1309860, 1397184, 1746480, 2095776, 2328640, 2619720, 3492960, 4191552, 5239440, 6985920, 10478880, 20957760]

約数ペア:

[(1, 20957760), (2, 10478880), (3, 6985920), (4, 5239440), (5, 4191552), (6, 3492960), (8, 2619720), (9, 2328640), (10, 2095776), (12, 1746480), (15, 1397184), (16, 1309860), (18, 1164320), (19, 1103040), (20, 1047888), (24, 873240), (30, 698592), (32, 654930), (36, 582160), (38, 551520), (40, 523944), (45, 465728), (48, 436620), (57, 367680), (60, 349296), (64, 327465), (72, 291080), (76, 275760), (80, 261972), (90, 232864), (95, 220608), (96, 218310), (114, 183840), (120, 174648), (144, 145540), (152, 137880), (160, 130986), (171, 122560), (180, 116432), (190, 110304), (192, 109155), (228, 91920), (240, 87324), (285, 73536), (288, 72770), (304, 68940), (320, 65493), (342, 61280), (360, 58216), (380, 55152), (383, 54720), (456, 45960), (480, 43662), (570, 36768), (576, 36385), (608, 34470), (684, 30640), (720, 29108), (760, 27576), (766, 27360), (855, 24512), (912, 22980), (960, 21831), (1140, 18384), (1149, 18240), (1216, 17235), (1368, 15320), (1440, 14554), (1520, 13788), (1532, 13680), (1710, 12256), (1824, 11490), (1915, 10944), (2280, 9192), (2298, 9120), (2736, 7660), (2880, 7277), (3040, 6894), (3064, 6840), (3420, 6128), (3447, 6080), (3648, 5745), (3830, 5472), (4560, 4596)]