19564820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{787}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 45275328

約数和(自身を除く): 25710508

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 113, 220, 226, 452, 565, 787, 1130, 1243, 1574, 2260, 2486, 3148, 3935, 4972, 6215, 7870, 8657, 12430, 15740, 17314, 24860, 34628, 43285, 86570, 88931, 173140, 177862, 355724, 444655, 889310, 978241, 1778620, 1956482, 3912964, 4891205, 9782410, 19564820]

約数ペア:

[(1, 19564820), (2, 9782410), (4, 4891205), (5, 3912964), (10, 1956482), (11, 1778620), (20, 978241), (22, 889310), (44, 444655), (55, 355724), (110, 177862), (113, 173140), (220, 88931), (226, 86570), (452, 43285), (565, 34628), (787, 24860), (1130, 17314), (1243, 15740), (1574, 12430), (2260, 8657), (2486, 7870), (3148, 6215), (3935, 4972)]