19680848

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1669}}^1$

素因数の和:1755

約数の個数: 40

約数和(自身を含む): 42244320

約数和(自身を除く): 22563472

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 67, 88, 134, 176, 268, 536, 737, 1072, 1474, 1669, 2948, 3338, 5896, 6676, 11792, 13352, 18359, 26704, 36718, 73436, 111823, 146872, 223646, 293744, 447292, 894584, 1230053, 1789168, 2460106, 4920212, 9840424, 19680848]

約数ペア:

[(1, 19680848), (2, 9840424), (4, 4920212), (8, 2460106), (11, 1789168), (16, 1230053), (22, 894584), (44, 447292), (67, 293744), (88, 223646), (134, 146872), (176, 111823), (268, 73436), (536, 36718), (737, 26704), (1072, 18359), (1474, 13352), (1669, 11792), (2948, 6676), (3338, 5896)]