19171980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2477}}^1$

素因数の和:2535

約数の個数: 72

約数和(自身を含む): 59531472

約数和(自身を除く): 40359492

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2477, 2580, 3870, 4954, 7431, 7740, 9908, 12385, 14862, 22293, 24770, 29724, 37155, 44586, 49540, 74310, 89172, 106511, 111465, 148620, 213022, 222930, 319533, 426044, 445860, 532555, 639066, 958599, 1065110, 1278132, 1597665, 1917198, 2130220, 3195330, 3834396, 4792995, 6390660, 9585990, 19171980]

約数ペア:

[(1, 19171980), (2, 9585990), (3, 6390660), (4, 4792995), (5, 3834396), (6, 3195330), (9, 2130220), (10, 1917198), (12, 1597665), (15, 1278132), (18, 1065110), (20, 958599), (30, 639066), (36, 532555), (43, 445860), (45, 426044), (60, 319533), (86, 222930), (90, 213022), (129, 148620), (172, 111465), (180, 106511), (215, 89172), (258, 74310), (387, 49540), (430, 44586), (516, 37155), (645, 29724), (774, 24770), (860, 22293), (1290, 14862), (1548, 12385), (1935, 9908), (2477, 7740), (2580, 7431), (3870, 4954)]