40720420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{8243}}^1$

素因数の和:8284

約数の個数: 48

約数和(自身を含む): 96949440

約数和(自身を除く): 56229020

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4940, 8243, 16486, 32972, 41215, 82430, 107159, 156617, 164860, 214318, 313234, 428636, 535795, 626468, 783085, 1071590, 1566170, 2036021, 2143180, 3132340, 4072042, 8144084, 10180105, 20360210, 40720420]

約数ペア:

[(1, 40720420), (2, 20360210), (4, 10180105), (5, 8144084), (10, 4072042), (13, 3132340), (19, 2143180), (20, 2036021), (26, 1566170), (38, 1071590), (52, 783085), (65, 626468), (76, 535795), (95, 428636), (130, 313234), (190, 214318), (247, 164860), (260, 156617), (380, 107159), (494, 82430), (988, 41215), (1235, 32972), (2470, 16486), (4940, 8243)]