21529395

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:146

約数の個数: 80

約数和(自身を含む): 42340320

約数和(自身を除く): 20810925

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 53, 59, 81, 85, 135, 153, 159, 177, 255, 265, 295, 405, 459, 477, 531, 765, 795, 885, 901, 1003, 1377, 1431, 1593, 2295, 2385, 2655, 2703, 3009, 3127, 4293, 4505, 4779, 5015, 6885, 7155, 7965, 8109, 9027, 9381, 13515, 15045, 15635, 21465, 23895, 24327, 27081, 28143, 40545, 45135, 46905, 53159, 72981, 81243, 84429, 121635, 135405, 140715, 159477, 253287, 265795, 364905, 406215, 422145, 478431, 797385, 1266435, 1435293, 2392155, 4305879, 7176465, 21529395]

約数ペア:

[(1, 21529395), (3, 7176465), (5, 4305879), (9, 2392155), (15, 1435293), (17, 1266435), (27, 797385), (45, 478431), (51, 422145), (53, 406215), (59, 364905), (81, 265795), (85, 253287), (135, 159477), (153, 140715), (159, 135405), (177, 121635), (255, 84429), (265, 81243), (295, 72981), (405, 53159), (459, 46905), (477, 45135), (531, 40545), (765, 28143), (795, 27081), (885, 24327), (901, 23895), (1003, 21465), (1377, 15635), (1431, 15045), (1593, 13515), (2295, 9381), (2385, 9027), (2655, 8109), (2703, 7965), (3009, 7155), (3127, 6885), (4293, 5015), (4505, 4779)]