21035170

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 43110144

約数和(自身を除く): 22074974

約数列:

[1, 2, 5, 10, 13, 26, 43, 53, 65, 71, 86, 106, 130, 142, 215, 265, 355, 430, 530, 559, 689, 710, 923, 1118, 1378, 1846, 2279, 2795, 3053, 3445, 3763, 4558, 4615, 5590, 6106, 6890, 7526, 9230, 11395, 15265, 18815, 22790, 29627, 30530, 37630, 39689, 48919, 59254, 79378, 97838, 148135, 161809, 198445, 244595, 296270, 323618, 396890, 489190, 809045, 1618090, 2103517, 4207034, 10517585, 21035170]

約数ペア:

[(1, 21035170), (2, 10517585), (5, 4207034), (10, 2103517), (13, 1618090), (26, 809045), (43, 489190), (53, 396890), (65, 323618), (71, 296270), (86, 244595), (106, 198445), (130, 161809), (142, 148135), (215, 97838), (265, 79378), (355, 59254), (430, 48919), (530, 39689), (559, 37630), (689, 30530), (710, 29627), (923, 22790), (1118, 18815), (1378, 15265), (1846, 11395), (2279, 9230), (2795, 7526), (3053, 6890), (3445, 6106), (3763, 5590), (4558, 4615)]