21105656

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{971}}^1$

素因数の和:1020

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 27883144

約数列:

[1, 2, 4, 8, 11, 13, 19, 22, 26, 38, 44, 52, 76, 88, 104, 143, 152, 209, 247, 286, 418, 494, 572, 836, 971, 988, 1144, 1672, 1942, 1976, 2717, 3884, 5434, 7768, 10681, 10868, 12623, 18449, 21362, 21736, 25246, 36898, 42724, 50492, 73796, 85448, 100984, 138853, 147592, 202939, 239837, 277706, 405878, 479674, 555412, 811756, 959348, 1110824, 1623512, 1918696, 2638207, 5276414, 10552828, 21105656]

約数ペア:

[(1, 21105656), (2, 10552828), (4, 5276414), (8, 2638207), (11, 1918696), (13, 1623512), (19, 1110824), (22, 959348), (26, 811756), (38, 555412), (44, 479674), (52, 405878), (76, 277706), (88, 239837), (104, 202939), (143, 147592), (152, 138853), (209, 100984), (247, 85448), (286, 73796), (418, 50492), (494, 42724), (572, 36898), (836, 25246), (971, 21736), (988, 21362), (1144, 18449), (1672, 12623), (1942, 10868), (1976, 10681), (2717, 7768), (3884, 5434)]