21012290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:267

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 23017150

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 47, 65, 94, 95, 130, 181, 190, 235, 247, 362, 470, 494, 611, 893, 905, 1222, 1235, 1786, 1810, 2353, 2470, 3055, 3439, 4465, 4706, 6110, 6878, 8507, 8930, 11609, 11765, 17014, 17195, 23218, 23530, 34390, 42535, 44707, 58045, 85070, 89414, 110591, 116090, 161633, 221182, 223535, 323266, 447070, 552955, 808165, 1105910, 1616330, 2101229, 4202458, 10506145, 21012290]

約数ペア:

[(1, 21012290), (2, 10506145), (5, 4202458), (10, 2101229), (13, 1616330), (19, 1105910), (26, 808165), (38, 552955), (47, 447070), (65, 323266), (94, 223535), (95, 221182), (130, 161633), (181, 116090), (190, 110591), (235, 89414), (247, 85070), (362, 58045), (470, 44707), (494, 42535), (611, 34390), (893, 23530), (905, 23218), (1222, 17195), (1235, 17014), (1786, 11765), (1810, 11609), (2353, 8930), (2470, 8507), (3055, 6878), (3439, 6110), (4465, 4706)]