21055545

素因数分解:

$3^4\times 5^1\times 7^2\times {\mathrm{1061}}^1$

素因数の和:1092

約数の個数: 60

約数和(自身を含む): 43947684

約数和(自身を除く): 22892139

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 81, 105, 135, 147, 189, 245, 315, 405, 441, 567, 735, 945, 1061, 1323, 2205, 2835, 3183, 3969, 5305, 6615, 7427, 9549, 15915, 19845, 22281, 28647, 37135, 47745, 51989, 66843, 85941, 111405, 143235, 155967, 200529, 259945, 334215, 429705, 467901, 601587, 779835, 1002645, 1403703, 2339505, 3007935, 4211109, 7018515, 21055545]

約数ペア:

[(1, 21055545), (3, 7018515), (5, 4211109), (7, 3007935), (9, 2339505), (15, 1403703), (21, 1002645), (27, 779835), (35, 601587), (45, 467901), (49, 429705), (63, 334215), (81, 259945), (105, 200529), (135, 155967), (147, 143235), (189, 111405), (245, 85941), (315, 66843), (405, 51989), (441, 47745), (567, 37135), (735, 28647), (945, 22281), (1061, 19845), (1323, 15915), (2205, 9549), (2835, 7427), (3183, 6615), (3969, 5305)]