20112345

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1$

素因数の和:1054

約数の個数: 48

約数和(自身を含む): 38997504

約数和(自身を除く): 18885159

約数列:

[1, 3, 5, 9, 11, 15, 33, 41, 45, 55, 99, 123, 165, 205, 369, 451, 495, 615, 991, 1353, 1845, 2255, 2973, 4059, 4955, 6765, 8919, 10901, 14865, 20295, 32703, 40631, 44595, 54505, 98109, 121893, 163515, 203155, 365679, 446941, 490545, 609465, 1340823, 1828395, 2234705, 4022469, 6704115, 20112345]

約数ペア:

[(1, 20112345), (3, 6704115), (5, 4022469), (9, 2234705), (11, 1828395), (15, 1340823), (33, 609465), (41, 490545), (45, 446941), (55, 365679), (99, 203155), (123, 163515), (165, 121893), (205, 98109), (369, 54505), (451, 44595), (495, 40631), (615, 32703), (991, 20295), (1353, 14865), (1845, 10901), (2255, 8919), (2973, 6765), (4059, 4955)]