21708165

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{1291}}^1$

素因数の和:1377

約数の個数: 32

約数和(自身を含む): 37209600

約数和(自身を除く): 15501435

約数列:

[1, 3, 5, 15, 19, 57, 59, 95, 177, 285, 295, 885, 1121, 1291, 3363, 3873, 5605, 6455, 16815, 19365, 24529, 73587, 76169, 122645, 228507, 367935, 380845, 1142535, 1447211, 4341633, 7236055, 21708165]

約数ペア:

[(1, 21708165), (3, 7236055), (5, 4341633), (15, 1447211), (19, 1142535), (57, 380845), (59, 367935), (95, 228507), (177, 122645), (285, 76169), (295, 73587), (885, 24529), (1121, 19365), (1291, 16815), (3363, 6455), (3873, 5605)]