21675740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{163}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 46976160

約数和(自身を除く): 25300420

約数列:

[1, 2, 4, 5, 10, 20, 61, 109, 122, 163, 218, 244, 305, 326, 436, 545, 610, 652, 815, 1090, 1220, 1630, 2180, 3260, 6649, 9943, 13298, 17767, 19886, 26596, 33245, 35534, 39772, 49715, 66490, 71068, 88835, 99430, 132980, 177670, 198860, 355340, 1083787, 2167574, 4335148, 5418935, 10837870, 21675740]

約数ペア:

[(1, 21675740), (2, 10837870), (4, 5418935), (5, 4335148), (10, 2167574), (20, 1083787), (61, 355340), (109, 198860), (122, 177670), (163, 132980), (218, 99430), (244, 88835), (305, 71068), (326, 66490), (436, 49715), (545, 39772), (610, 35534), (652, 33245), (815, 26596), (1090, 19886), (1220, 17767), (1630, 13298), (2180, 9943), (3260, 6649)]