21749572

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 42844032

約数和(自身を除く): 21094460

約数列:

[1, 2, 4, 13, 26, 43, 52, 71, 86, 137, 142, 172, 274, 284, 548, 559, 923, 1118, 1781, 1846, 2236, 3053, 3562, 3692, 5891, 6106, 7124, 9727, 11782, 12212, 19454, 23564, 38908, 39689, 76583, 79378, 126451, 153166, 158756, 252902, 306332, 418261, 505804, 836522, 1673044, 5437393, 10874786, 21749572]

約数ペア:

[(1, 21749572), (2, 10874786), (4, 5437393), (13, 1673044), (26, 836522), (43, 505804), (52, 418261), (71, 306332), (86, 252902), (137, 158756), (142, 153166), (172, 126451), (274, 79378), (284, 76583), (548, 39689), (559, 38908), (923, 23564), (1118, 19454), (1781, 12212), (1846, 11782), (2236, 9727), (3053, 7124), (3562, 6106), (3692, 5891)]