21691384

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{283}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 48666240

約数和(自身を除く): 26974856

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 67, 88, 104, 134, 143, 268, 283, 286, 536, 566, 572, 737, 871, 1132, 1144, 1474, 1742, 2264, 2948, 3113, 3484, 3679, 5896, 6226, 6968, 7358, 9581, 12452, 14716, 18961, 19162, 24904, 29432, 37922, 38324, 40469, 75844, 76648, 80938, 151688, 161876, 208571, 246493, 323752, 417142, 492986, 834284, 985972, 1668568, 1971944, 2711423, 5422846, 10845692, 21691384]

約数ペア:

[(1, 21691384), (2, 10845692), (4, 5422846), (8, 2711423), (11, 1971944), (13, 1668568), (22, 985972), (26, 834284), (44, 492986), (52, 417142), (67, 323752), (88, 246493), (104, 208571), (134, 161876), (143, 151688), (268, 80938), (283, 76648), (286, 75844), (536, 40469), (566, 38324), (572, 37922), (737, 29432), (871, 24904), (1132, 19162), (1144, 18961), (1474, 14716), (1742, 12452), (2264, 9581), (2948, 7358), (3113, 6968), (3484, 6226), (3679, 5896)]