20653980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20249}}^1$

素因数の和:20278

約数の個数: 48

約数和(自身を含む): 61236000

約数和(自身を除く): 40582020

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 20249, 40498, 60747, 80996, 101245, 121494, 202490, 242988, 303735, 344233, 404980, 607470, 688466, 1032699, 1214940, 1376932, 1721165, 2065398, 3442330, 4130796, 5163495, 6884660, 10326990, 20653980]

約数ペア:

[(1, 20653980), (2, 10326990), (3, 6884660), (4, 5163495), (5, 4130796), (6, 3442330), (10, 2065398), (12, 1721165), (15, 1376932), (17, 1214940), (20, 1032699), (30, 688466), (34, 607470), (51, 404980), (60, 344233), (68, 303735), (85, 242988), (102, 202490), (170, 121494), (204, 101245), (255, 80996), (340, 60747), (510, 40498), (1020, 20249)]