21659360

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7963}}^1$

素因数の和:7995

約数の個数: 48

約数和(自身を含む): 54187056

約数和(自身を除く): 32527696

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7963, 15926, 31852, 39815, 63704, 79630, 127408, 135371, 159260, 254816, 270742, 318520, 541484, 637040, 676855, 1082968, 1274080, 1353710, 2165936, 2707420, 4331872, 5414840, 10829680, 21659360]

約数ペア:

[(1, 21659360), (2, 10829680), (4, 5414840), (5, 4331872), (8, 2707420), (10, 2165936), (16, 1353710), (17, 1274080), (20, 1082968), (32, 676855), (34, 637040), (40, 541484), (68, 318520), (80, 270742), (85, 254816), (136, 159260), (160, 135371), (170, 127408), (272, 79630), (340, 63704), (544, 39815), (680, 31852), (1360, 15926), (2720, 7963)]