21619885

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{251}}^1$

素因数の和:393

約数の個数: 32

約数和(自身を含む): 31352832

約数和(自身を除く): 9732947

約数列:

[1, 5, 7, 23, 35, 107, 115, 161, 251, 535, 749, 805, 1255, 1757, 2461, 3745, 5773, 8785, 12305, 17227, 26857, 28865, 40411, 86135, 134285, 187999, 202055, 617711, 939995, 3088555, 4323977, 21619885]

約数ペア:

[(1, 21619885), (5, 4323977), (7, 3088555), (23, 939995), (35, 617711), (107, 202055), (115, 187999), (161, 134285), (251, 86135), (535, 40411), (749, 28865), (805, 26857), (1255, 17227), (1757, 12305), (2461, 8785), (3745, 5773)]