20985844

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 21471116

約数列:

[1, 2, 4, 11, 22, 23, 44, 46, 89, 92, 178, 233, 253, 356, 466, 506, 932, 979, 1012, 1958, 2047, 2563, 3916, 4094, 5126, 5359, 8188, 10252, 10718, 20737, 21436, 22517, 41474, 45034, 58949, 82948, 90068, 117898, 228107, 235796, 456214, 476951, 912428, 953902, 1907804, 5246461, 10492922, 20985844]

約数ペア:

[(1, 20985844), (2, 10492922), (4, 5246461), (11, 1907804), (22, 953902), (23, 912428), (44, 476951), (46, 456214), (89, 235796), (92, 228107), (178, 117898), (233, 90068), (253, 82948), (356, 58949), (466, 45034), (506, 41474), (932, 22517), (979, 21436), (1012, 20737), (1958, 10718), (2047, 10252), (2563, 8188), (3916, 5359), (4094, 5126)]