21443457

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{241}}^1$

素因数の和:493

約数の個数: 32

約数和(自身を含む): 34693120

約数和(自身を除く): 13249663

約数列:

[1, 3, 7, 19, 21, 57, 133, 223, 241, 399, 669, 723, 1561, 1687, 4237, 4579, 4683, 5061, 12711, 13737, 29659, 32053, 53743, 88977, 96159, 161229, 376201, 1021117, 1128603, 3063351, 7147819, 21443457]

約数ペア:

[(1, 21443457), (3, 7147819), (7, 3063351), (19, 1128603), (21, 1021117), (57, 376201), (133, 161229), (223, 96159), (241, 88977), (399, 53743), (669, 32053), (723, 29659), (1561, 13737), (1687, 12711), (4237, 5061), (4579, 4683)]