21209578

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{311}}^1$

素因数の和:430

約数の個数: 32

約数和(自身を含む): 35747712

約数和(自身を除く): 14538134

約数列:

[1, 2, 13, 26, 43, 61, 86, 122, 311, 559, 622, 793, 1118, 1586, 2623, 4043, 5246, 8086, 13373, 18971, 26746, 34099, 37942, 68198, 173849, 246623, 347698, 493246, 815753, 1631506, 10604789, 21209578]

約数ペア:

[(1, 21209578), (2, 10604789), (13, 1631506), (26, 815753), (43, 493246), (61, 347698), (86, 246623), (122, 173849), (311, 68198), (559, 37942), (622, 34099), (793, 26746), (1118, 18971), (1586, 13373), (2623, 8086), (4043, 5246)]