21331300

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 49649600

約数和(自身を除く): 28318300

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 103, 109, 190, 206, 218, 380, 412, 436, 475, 515, 545, 950, 1030, 1090, 1900, 1957, 2060, 2071, 2180, 2575, 2725, 3914, 4142, 5150, 5450, 7828, 8284, 9785, 10300, 10355, 10900, 11227, 19570, 20710, 22454, 39140, 41420, 44908, 48925, 51775, 56135, 97850, 103550, 112270, 195700, 207100, 213313, 224540, 280675, 426626, 561350, 853252, 1066565, 1122700, 2133130, 4266260, 5332825, 10665650, 21331300]

約数ペア:

[(1, 21331300), (2, 10665650), (4, 5332825), (5, 4266260), (10, 2133130), (19, 1122700), (20, 1066565), (25, 853252), (38, 561350), (50, 426626), (76, 280675), (95, 224540), (100, 213313), (103, 207100), (109, 195700), (190, 112270), (206, 103550), (218, 97850), (380, 56135), (412, 51775), (436, 48925), (475, 44908), (515, 41420), (545, 39140), (950, 22454), (1030, 20710), (1090, 19570), (1900, 11227), (1957, 10900), (2060, 10355), (2071, 10300), (2180, 9785), (2575, 8284), (2725, 7828), (3914, 5450), (4142, 5150)]