21206535

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1453}}^1$

素因数の和:1607

約数の個数: 32

約数和(自身を含む): 39083520

約数和(自身を除く): 17876985

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 139, 417, 695, 973, 1453, 2085, 2919, 4359, 4865, 7265, 10171, 14595, 21795, 30513, 50855, 152565, 201967, 605901, 1009835, 1413769, 3029505, 4241307, 7068845, 21206535]

約数ペア:

[(1, 21206535), (3, 7068845), (5, 4241307), (7, 3029505), (15, 1413769), (21, 1009835), (35, 605901), (105, 201967), (139, 152565), (417, 50855), (695, 30513), (973, 21795), (1453, 14595), (2085, 10171), (2919, 7265), (4359, 4865)]