21661899

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{181}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 34245120

約数和(自身を除く): 12583221

約数列:

[1, 3, 7, 21, 41, 123, 139, 181, 287, 417, 543, 861, 973, 1267, 2919, 3801, 5699, 7421, 17097, 22263, 25159, 39893, 51947, 75477, 119679, 155841, 176113, 528339, 1031519, 3094557, 7220633, 21661899]

約数ペア:

[(1, 21661899), (3, 7220633), (7, 3094557), (21, 1031519), (41, 528339), (123, 176113), (139, 155841), (181, 119679), (287, 75477), (417, 51947), (543, 39893), (861, 25159), (973, 22263), (1267, 17097), (2919, 7421), (3801, 5699)]