19985368

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 42688800

約数和(自身を除く): 22703432

約数列:

[1, 2, 4, 8, 13, 26, 41, 43, 52, 82, 86, 104, 109, 164, 172, 218, 328, 344, 436, 533, 559, 872, 1066, 1118, 1417, 1763, 2132, 2236, 2834, 3526, 4264, 4469, 4472, 4687, 5668, 7052, 8938, 9374, 11336, 14104, 17876, 18748, 22919, 35752, 37496, 45838, 58097, 60931, 91676, 116194, 121862, 183352, 192167, 232388, 243724, 384334, 464776, 487448, 768668, 1537336, 2498171, 4996342, 9992684, 19985368]

約数ペア:

[(1, 19985368), (2, 9992684), (4, 4996342), (8, 2498171), (13, 1537336), (26, 768668), (41, 487448), (43, 464776), (52, 384334), (82, 243724), (86, 232388), (104, 192167), (109, 183352), (164, 121862), (172, 116194), (218, 91676), (328, 60931), (344, 58097), (436, 45838), (533, 37496), (559, 35752), (872, 22919), (1066, 18748), (1118, 17876), (1417, 14104), (1763, 11336), (2132, 9374), (2236, 8938), (2834, 7052), (3526, 5668), (4264, 4687), (4469, 4472)]