19713915

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{239}}^1$

素因数の和:313

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18993285

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 47, 65, 117, 135, 141, 195, 235, 239, 351, 423, 585, 611, 705, 717, 1195, 1269, 1755, 1833, 2115, 2151, 3055, 3107, 3585, 5499, 6345, 6453, 9165, 9321, 10755, 11233, 15535, 16497, 27495, 27963, 32265, 33699, 46605, 56165, 82485, 83889, 101097, 139815, 146029, 168495, 303291, 419445, 438087, 505485, 730145, 1314261, 1516455, 2190435, 3942783, 6571305, 19713915]

約数ペア:

[(1, 19713915), (3, 6571305), (5, 3942783), (9, 2190435), (13, 1516455), (15, 1314261), (27, 730145), (39, 505485), (45, 438087), (47, 419445), (65, 303291), (117, 168495), (135, 146029), (141, 139815), (195, 101097), (235, 83889), (239, 82485), (351, 56165), (423, 46605), (585, 33699), (611, 32265), (705, 27963), (717, 27495), (1195, 16497), (1269, 15535), (1755, 11233), (1833, 10755), (2115, 9321), (2151, 9165), (3055, 6453), (3107, 6345), (3585, 5499)]