1991103681

素因数分解:

$3^1\times 7^4\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{241}}^1$

素因数の和:340

約数の個数: 80

約数和(自身を含む): 3297023488

約数和(自身を除く): 1305919807

約数列:

[1, 3, 7, 21, 31, 37, 49, 93, 111, 147, 217, 241, 259, 343, 651, 723, 777, 1029, 1147, 1519, 1687, 1813, 2401, 3441, 4557, 5061, 5439, 7203, 7471, 8029, 8917, 10633, 11809, 12691, 22413, 24087, 26751, 31899, 35427, 38073, 52297, 56203, 62419, 74431, 82663, 88837, 156891, 168609, 187257, 223293, 247989, 266511, 276427, 366079, 393421, 436933, 578641, 829281, 1098237, 1180263, 1310799, 1735923, 1934989, 2562553, 2753947, 3058531, 5804967, 7687659, 8261841, 9175593, 13544923, 17937871, 21409717, 40634769, 53813613, 64229151, 94814461, 284443383, 663701227, 1991103681]

約数ペア:

[(1, 1991103681), (3, 663701227), (7, 284443383), (21, 94814461), (31, 64229151), (37, 53813613), (49, 40634769), (93, 21409717), (111, 17937871), (147, 13544923), (217, 9175593), (241, 8261841), (259, 7687659), (343, 5804967), (651, 3058531), (723, 2753947), (777, 2562553), (1029, 1934989), (1147, 1735923), (1519, 1310799), (1687, 1180263), (1813, 1098237), (2401, 829281), (3441, 578641), (4557, 436933), (5061, 393421), (5439, 366079), (7203, 276427), (7471, 266511), (8029, 247989), (8917, 223293), (10633, 187257), (11809, 168609), (12691, 156891), (22413, 88837), (24087, 82663), (26751, 74431), (31899, 62419), (35427, 56203), (38073, 52297)]