21487388

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{223}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 43464960

約数和(自身を除く): 21977572

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 109, 218, 221, 223, 436, 442, 446, 884, 892, 1417, 1853, 2834, 2899, 3706, 3791, 5668, 5798, 7412, 7582, 11596, 15164, 24089, 24307, 48178, 48614, 49283, 96356, 97228, 98566, 197132, 315991, 413219, 631982, 826438, 1263964, 1652876, 5371847, 10743694, 21487388]

約数ペア:

[(1, 21487388), (2, 10743694), (4, 5371847), (13, 1652876), (17, 1263964), (26, 826438), (34, 631982), (52, 413219), (68, 315991), (109, 197132), (218, 98566), (221, 97228), (223, 96356), (436, 49283), (442, 48614), (446, 48178), (884, 24307), (892, 24089), (1417, 15164), (1853, 11596), (2834, 7582), (2899, 7412), (3706, 5798), (3791, 5668)]