20949615

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16789905

約数列:

[1, 3, 5, 9, 15, 45, 71, 79, 83, 213, 237, 249, 355, 395, 415, 639, 711, 747, 1065, 1185, 1245, 3195, 3555, 3735, 5609, 5893, 6557, 16827, 17679, 19671, 28045, 29465, 32785, 50481, 53037, 59013, 84135, 88395, 98355, 252405, 265185, 295065, 465547, 1396641, 2327735, 4189923, 6983205, 20949615]

約数ペア:

[(1, 20949615), (3, 6983205), (5, 4189923), (9, 2327735), (15, 1396641), (45, 465547), (71, 295065), (79, 265185), (83, 252405), (213, 98355), (237, 88395), (249, 84135), (355, 59013), (395, 53037), (415, 50481), (639, 32785), (711, 29465), (747, 28045), (1065, 19671), (1185, 17679), (1245, 16827), (3195, 6557), (3555, 5893), (3735, 5609)]