21000427935

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{3947}}^1$

素因数の和:4184

約数の個数: 64

約数和(自身を含む): 35170426368

約数和(自身を除く): 14169998433

約数列:

[1, 3, 5, 15, 43, 73, 113, 129, 215, 219, 339, 365, 565, 645, 1095, 1695, 3139, 3947, 4859, 8249, 9417, 11841, 14577, 15695, 19735, 24295, 24747, 41245, 47085, 59205, 72885, 123735, 169721, 288131, 354707, 446011, 509163, 848605, 864393, 1064121, 1338033, 1440655, 1773535, 2230055, 2545815, 4321965, 5320605, 6690165, 12389633, 19178473, 32558803, 37168899, 57535419, 61948165, 95892365, 97676409, 162794015, 185844495, 287677095, 488382045, 1400028529, 4200085587, 7000142645, 21000427935]

約数ペア:

[(1, 21000427935), (3, 7000142645), (5, 4200085587), (15, 1400028529), (43, 488382045), (73, 287677095), (113, 185844495), (129, 162794015), (215, 97676409), (219, 95892365), (339, 61948165), (365, 57535419), (565, 37168899), (645, 32558803), (1095, 19178473), (1695, 12389633), (3139, 6690165), (3947, 5320605), (4859, 4321965), (8249, 2545815), (9417, 2230055), (11841, 1773535), (14577, 1440655), (15695, 1338033), (19735, 1064121), (24295, 864393), (24747, 848605), (41245, 509163), (47085, 446011), (59205, 354707), (72885, 288131), (123735, 169721)]