19999472

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{709}}^1$

素因数の和:801

約数の個数: 40

約数和(自身を含む): 40674480

約数和(自身を除く): 20675008

約数列:

[1, 2, 4, 8, 16, 41, 43, 82, 86, 164, 172, 328, 344, 656, 688, 709, 1418, 1763, 2836, 3526, 5672, 7052, 11344, 14104, 28208, 29069, 30487, 58138, 60974, 116276, 121948, 232552, 243896, 465104, 487792, 1249967, 2499934, 4999868, 9999736, 19999472]

約数ペア:

[(1, 19999472), (2, 9999736), (4, 4999868), (8, 2499934), (16, 1249967), (41, 487792), (43, 465104), (82, 243896), (86, 232552), (164, 121948), (172, 116276), (328, 60974), (344, 58138), (656, 30487), (688, 29069), (709, 28208), (1418, 14104), (1763, 11344), (2836, 7052), (3526, 5672)]