21771568

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{787}}^1$

素因数の和:834

約数の個数: 80

約数和(自身を含む): 54718720

約数和(自身を除く): 32947152

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 38, 52, 56, 76, 91, 104, 112, 133, 152, 182, 208, 247, 266, 304, 364, 494, 532, 728, 787, 988, 1064, 1456, 1574, 1729, 1976, 2128, 3148, 3458, 3952, 5509, 6296, 6916, 10231, 11018, 12592, 13832, 14953, 20462, 22036, 27664, 29906, 40924, 44072, 59812, 71617, 81848, 88144, 104671, 119624, 143234, 163696, 194389, 209342, 239248, 286468, 388778, 418684, 572936, 777556, 837368, 1145872, 1360723, 1555112, 1674736, 2721446, 3110224, 5442892, 10885784, 21771568]

約数ペア:

[(1, 21771568), (2, 10885784), (4, 5442892), (7, 3110224), (8, 2721446), (13, 1674736), (14, 1555112), (16, 1360723), (19, 1145872), (26, 837368), (28, 777556), (38, 572936), (52, 418684), (56, 388778), (76, 286468), (91, 239248), (104, 209342), (112, 194389), (133, 163696), (152, 143234), (182, 119624), (208, 104671), (247, 88144), (266, 81848), (304, 71617), (364, 59812), (494, 44072), (532, 40924), (728, 29906), (787, 27664), (988, 22036), (1064, 20462), (1456, 14953), (1574, 13832), (1729, 12592), (1976, 11018), (2128, 10231), (3148, 6916), (3458, 6296), (3952, 5509)]