21163545

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:447

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 20769255

約数列:

[1, 3, 5, 9, 13, 15, 27, 31, 39, 45, 65, 93, 117, 135, 155, 195, 279, 351, 389, 403, 465, 585, 837, 1167, 1209, 1395, 1755, 1945, 2015, 3501, 3627, 4185, 5057, 5835, 6045, 10503, 10881, 12059, 15171, 17505, 18135, 25285, 36177, 45513, 52515, 54405, 60295, 75855, 108531, 136539, 156767, 180885, 227565, 325593, 470301, 542655, 682695, 783835, 1410903, 1627965, 2351505, 4232709, 7054515, 21163545]

約数ペア:

[(1, 21163545), (3, 7054515), (5, 4232709), (9, 2351505), (13, 1627965), (15, 1410903), (27, 783835), (31, 682695), (39, 542655), (45, 470301), (65, 325593), (93, 227565), (117, 180885), (135, 156767), (155, 136539), (195, 108531), (279, 75855), (351, 60295), (389, 54405), (403, 52515), (465, 45513), (585, 36177), (837, 25285), (1167, 18135), (1209, 17505), (1395, 15171), (1755, 12059), (1945, 10881), (2015, 10503), (3501, 6045), (3627, 5835), (4185, 5057)]