21445585

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{271}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 33488640

約数和(自身を除く): 12043055

約数列:

[1, 5, 7, 17, 19, 35, 49, 85, 95, 119, 133, 245, 271, 323, 595, 665, 833, 931, 1355, 1615, 1897, 2261, 4165, 4607, 4655, 5149, 9485, 11305, 13279, 15827, 23035, 25745, 32249, 36043, 66395, 79135, 87533, 161245, 180215, 225743, 252301, 437665, 612731, 1128715, 1261505, 3063655, 4289117, 21445585]

約数ペア:

[(1, 21445585), (5, 4289117), (7, 3063655), (17, 1261505), (19, 1128715), (35, 612731), (49, 437665), (85, 252301), (95, 225743), (119, 180215), (133, 161245), (245, 87533), (271, 79135), (323, 66395), (595, 36043), (665, 32249), (833, 25745), (931, 23035), (1355, 15827), (1615, 13279), (1897, 11305), (2261, 9485), (4165, 5149), (4607, 4655)]