19970355

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{641}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 33527808

約数和(自身を除く): 13557453

約数列:

[1, 3, 5, 15, 31, 67, 93, 155, 201, 335, 465, 641, 1005, 1923, 2077, 3205, 6231, 9615, 10385, 19871, 31155, 42947, 59613, 99355, 128841, 214735, 298065, 644205, 1331357, 3994071, 6656785, 19970355]

約数ペア:

[(1, 19970355), (3, 6656785), (5, 3994071), (15, 1331357), (31, 644205), (67, 298065), (93, 214735), (155, 128841), (201, 99355), (335, 59613), (465, 42947), (641, 31155), (1005, 19871), (1923, 10385), (2077, 9615), (3205, 6231)]