18218260

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 39528720

約数和(自身を除く): 21310460

約数列:

[1, 2, 4, 5, 10, 20, 61, 109, 122, 137, 218, 244, 274, 305, 436, 545, 548, 610, 685, 1090, 1220, 1370, 2180, 2740, 6649, 8357, 13298, 14933, 16714, 26596, 29866, 33245, 33428, 41785, 59732, 66490, 74665, 83570, 132980, 149330, 167140, 298660, 910913, 1821826, 3643652, 4554565, 9109130, 18218260]

約数ペア:

[(1, 18218260), (2, 9109130), (4, 4554565), (5, 3643652), (10, 1821826), (20, 910913), (61, 298660), (109, 167140), (122, 149330), (137, 132980), (218, 83570), (244, 74665), (274, 66490), (305, 59732), (436, 41785), (545, 33428), (548, 33245), (610, 29866), (685, 26596), (1090, 16714), (1220, 14933), (1370, 13298), (2180, 8357), (2740, 6649)]