79920980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{601}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 172436880

約数和(自身を除く): 92515900

約数列:

[1, 2, 4, 5, 10, 20, 61, 109, 122, 218, 244, 305, 436, 545, 601, 610, 1090, 1202, 1220, 2180, 2404, 3005, 6010, 6649, 12020, 13298, 26596, 33245, 36661, 65509, 66490, 73322, 131018, 132980, 146644, 183305, 262036, 327545, 366610, 655090, 733220, 1310180, 3996049, 7992098, 15984196, 19980245, 39960490, 79920980]

約数ペア:

[(1, 79920980), (2, 39960490), (4, 19980245), (5, 15984196), (10, 7992098), (20, 3996049), (61, 1310180), (109, 733220), (122, 655090), (218, 366610), (244, 327545), (305, 262036), (436, 183305), (545, 146644), (601, 132980), (610, 131018), (1090, 73322), (1202, 66490), (1220, 65509), (2180, 36661), (2404, 33245), (3005, 26596), (6010, 13298), (6649, 12020)]