21581388

素因数分解:

$2^2\times 3^2\times {\mathrm{53}}^1\times {\mathrm{11311}}^1$

素因数の和:11374

約数の個数: 36

約数和(自身を含む): 55587168

約数和(自身を除く): 34005780

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 53, 106, 159, 212, 318, 477, 636, 954, 1908, 11311, 22622, 33933, 45244, 67866, 101799, 135732, 203598, 407196, 599483, 1198966, 1798449, 2397932, 3596898, 5395347, 7193796, 10790694, 21581388]

約数ペア:

[(1, 21581388), (2, 10790694), (3, 7193796), (4, 5395347), (6, 3596898), (9, 2397932), (12, 1798449), (18, 1198966), (36, 599483), (53, 407196), (106, 203598), (159, 135732), (212, 101799), (318, 67866), (477, 45244), (636, 33933), (954, 22622), (1908, 11311)]