21180222

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1571}}^1$

素因数の和:1693

約数の個数: 48

約数和(自身を含む): 52970112

約数和(自身を除く): 31789890

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 107, 126, 214, 321, 642, 749, 963, 1498, 1571, 1926, 2247, 3142, 4494, 4713, 6741, 9426, 10997, 13482, 14139, 21994, 28278, 32991, 65982, 98973, 168097, 197946, 336194, 504291, 1008582, 1176679, 1512873, 2353358, 3025746, 3530037, 7060074, 10590111, 21180222]

約数ペア:

[(1, 21180222), (2, 10590111), (3, 7060074), (6, 3530037), (7, 3025746), (9, 2353358), (14, 1512873), (18, 1176679), (21, 1008582), (42, 504291), (63, 336194), (107, 197946), (126, 168097), (214, 98973), (321, 65982), (642, 32991), (749, 28278), (963, 21994), (1498, 14139), (1571, 13482), (1926, 10997), (2247, 9426), (3142, 6741), (4494, 4713)]