78339860

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:636

約数の個数: 48

約数和(自身を含む): 168687120

約数和(自身を除く): 90347260

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 157, 244, 305, 314, 409, 610, 628, 785, 818, 1220, 1570, 1636, 2045, 3140, 4090, 8180, 9577, 19154, 24949, 38308, 47885, 49898, 64213, 95770, 99796, 124745, 128426, 191540, 249490, 256852, 321065, 498980, 642130, 1284260, 3916993, 7833986, 15667972, 19584965, 39169930, 78339860]

約数ペア:

[(1, 78339860), (2, 39169930), (4, 19584965), (5, 15667972), (10, 7833986), (20, 3916993), (61, 1284260), (122, 642130), (157, 498980), (244, 321065), (305, 256852), (314, 249490), (409, 191540), (610, 128426), (628, 124745), (785, 99796), (818, 95770), (1220, 64213), (1570, 49898), (1636, 47885), (2045, 38308), (3140, 24949), (4090, 19154), (8180, 9577)]