19701585

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{487}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 36541440

約数和(自身を除く): 16839855

約数列:

[1, 3, 5, 9, 15, 29, 31, 45, 87, 93, 145, 155, 261, 279, 435, 465, 487, 899, 1305, 1395, 1461, 2435, 2697, 4383, 4495, 7305, 8091, 13485, 14123, 15097, 21915, 40455, 42369, 45291, 70615, 75485, 127107, 135873, 211845, 226455, 437813, 635535, 679365, 1313439, 2189065, 3940317, 6567195, 19701585]

約数ペア:

[(1, 19701585), (3, 6567195), (5, 3940317), (9, 2189065), (15, 1313439), (29, 679365), (31, 635535), (45, 437813), (87, 226455), (93, 211845), (145, 135873), (155, 127107), (261, 75485), (279, 70615), (435, 45291), (465, 42369), (487, 40455), (899, 21915), (1305, 15097), (1395, 14123), (1461, 13485), (2435, 8091), (2697, 7305), (4383, 4495)]