20256340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{461}}^1$

素因数の和:509

約数の個数: 48

約数和(自身を含む): 46181520

約数和(自身を除く): 25925180

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 461, 676, 845, 922, 1690, 1844, 2197, 2305, 3380, 4394, 4610, 5993, 8788, 9220, 10985, 11986, 21970, 23972, 29965, 43940, 59930, 77909, 119860, 155818, 311636, 389545, 779090, 1012817, 1558180, 2025634, 4051268, 5064085, 10128170, 20256340]

約数ペア:

[(1, 20256340), (2, 10128170), (4, 5064085), (5, 4051268), (10, 2025634), (13, 1558180), (20, 1012817), (26, 779090), (52, 389545), (65, 311636), (130, 155818), (169, 119860), (260, 77909), (338, 59930), (461, 43940), (676, 29965), (845, 23972), (922, 21970), (1690, 11986), (1844, 10985), (2197, 9220), (2305, 8788), (3380, 5993), (4394, 4610)]