21075285

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:354

約数の個数: 64

約数和(自身を含む): 42799104

約数和(自身を除く): 21723819

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 71, 77, 105, 165, 213, 231, 257, 355, 385, 497, 771, 781, 1065, 1155, 1285, 1491, 1799, 2343, 2485, 2827, 3855, 3905, 5397, 5467, 7455, 8481, 8995, 11715, 14135, 16401, 18247, 19789, 26985, 27335, 42405, 54741, 59367, 82005, 91235, 98945, 127729, 200717, 273705, 296835, 383187, 602151, 638645, 1003585, 1405019, 1915935, 3010755, 4215057, 7025095, 21075285]

約数ペア:

[(1, 21075285), (3, 7025095), (5, 4215057), (7, 3010755), (11, 1915935), (15, 1405019), (21, 1003585), (33, 638645), (35, 602151), (55, 383187), (71, 296835), (77, 273705), (105, 200717), (165, 127729), (213, 98945), (231, 91235), (257, 82005), (355, 59367), (385, 54741), (497, 42405), (771, 27335), (781, 26985), (1065, 19789), (1155, 18247), (1285, 16401), (1491, 14135), (1799, 11715), (2343, 8995), (2485, 8481), (2827, 7455), (3855, 5467), (3905, 5397)]