66156940

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1\times {\mathrm{257}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 142428384

約数和(自身を除く): 76271444

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 211, 244, 257, 305, 422, 514, 610, 844, 1028, 1055, 1220, 1285, 2110, 2570, 4220, 5140, 12871, 15677, 25742, 31354, 51484, 54227, 62708, 64355, 78385, 108454, 128710, 156770, 216908, 257420, 271135, 313540, 542270, 1084540, 3307847, 6615694, 13231388, 16539235, 33078470, 66156940]

約数ペア:

[(1, 66156940), (2, 33078470), (4, 16539235), (5, 13231388), (10, 6615694), (20, 3307847), (61, 1084540), (122, 542270), (211, 313540), (244, 271135), (257, 257420), (305, 216908), (422, 156770), (514, 128710), (610, 108454), (844, 78385), (1028, 64355), (1055, 62708), (1220, 54227), (1285, 51484), (2110, 31354), (2570, 25742), (4220, 15677), (5140, 12871)]