21204872

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{4973}}^1$

素因数の和:5033

約数の個数: 32

約数和(自身を含む): 43870680

約数和(自身を除く): 22665808

約数列:

[1, 2, 4, 8, 13, 26, 41, 52, 82, 104, 164, 328, 533, 1066, 2132, 4264, 4973, 9946, 19892, 39784, 64649, 129298, 203893, 258596, 407786, 517192, 815572, 1631144, 2650609, 5301218, 10602436, 21204872]

約数ペア:

[(1, 21204872), (2, 10602436), (4, 5301218), (8, 2650609), (13, 1631144), (26, 815572), (41, 517192), (52, 407786), (82, 258596), (104, 203893), (164, 129298), (328, 64649), (533, 39784), (1066, 19892), (2132, 9946), (4264, 4973)]