20801648

素因数分解:

$2^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2351}}^1$

素因数の和:2445

約数の個数: 40

約数和(自身を含む): 46663680

約数和(自身を除く): 25862032

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 79, 112, 158, 316, 553, 632, 1106, 1264, 2212, 2351, 4424, 4702, 8848, 9404, 16457, 18808, 32914, 37616, 65828, 131656, 185729, 263312, 371458, 742916, 1300103, 1485832, 2600206, 2971664, 5200412, 10400824, 20801648]

約数ペア:

[(1, 20801648), (2, 10400824), (4, 5200412), (7, 2971664), (8, 2600206), (14, 1485832), (16, 1300103), (28, 742916), (56, 371458), (79, 263312), (112, 185729), (158, 131656), (316, 65828), (553, 37616), (632, 32914), (1106, 18808), (1264, 16457), (2212, 9404), (2351, 8848), (4424, 4702)]