21220641

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{227}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 14631903

約数列:

[1, 3, 9, 13, 17, 39, 47, 51, 117, 141, 153, 221, 227, 423, 611, 663, 681, 799, 1833, 1989, 2043, 2397, 2951, 3859, 5499, 7191, 8853, 10387, 10669, 11577, 26559, 31161, 32007, 34731, 50167, 93483, 96021, 138697, 150501, 181373, 416091, 451503, 544119, 1248273, 1632357, 2357849, 7073547, 21220641]

約数ペア:

[(1, 21220641), (3, 7073547), (9, 2357849), (13, 1632357), (17, 1248273), (39, 544119), (47, 451503), (51, 416091), (117, 181373), (141, 150501), (153, 138697), (221, 96021), (227, 93483), (423, 50167), (611, 34731), (663, 32007), (681, 31161), (799, 26559), (1833, 11577), (1989, 10669), (2043, 10387), (2397, 8853), (2951, 7191), (3859, 5499)]