19504980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{9851}}^1$

素因数の和:9877

約数の個数: 72

約数和(自身を含む): 64550304

約数和(自身を除く): 45045324

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 9851, 19702, 29553, 39404, 49255, 59106, 88659, 98510, 108361, 118212, 147765, 177318, 197020, 216722, 295530, 325083, 354636, 433444, 443295, 541805, 591060, 650166, 886590, 975249, 1083610, 1300332, 1625415, 1773180, 1950498, 2167220, 3250830, 3900996, 4876245, 6501660, 9752490, 19504980]

約数ペア:

[(1, 19504980), (2, 9752490), (3, 6501660), (4, 4876245), (5, 3900996), (6, 3250830), (9, 2167220), (10, 1950498), (11, 1773180), (12, 1625415), (15, 1300332), (18, 1083610), (20, 975249), (22, 886590), (30, 650166), (33, 591060), (36, 541805), (44, 443295), (45, 433444), (55, 354636), (60, 325083), (66, 295530), (90, 216722), (99, 197020), (110, 177318), (132, 147765), (165, 118212), (180, 108361), (198, 98510), (220, 88659), (330, 59106), (396, 49255), (495, 39404), (660, 29553), (990, 19702), (1980, 9851)]