18887840

素因数分解:

$2^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1217}}^1$

素因数の和:1329

約数の個数: 48

約数和(自身を含む): 45119592

約数和(自身を除く): 26231752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 97, 160, 194, 388, 485, 776, 970, 1217, 1552, 1940, 2434, 3104, 3880, 4868, 6085, 7760, 9736, 12170, 15520, 19472, 24340, 38944, 48680, 97360, 118049, 194720, 236098, 472196, 590245, 944392, 1180490, 1888784, 2360980, 3777568, 4721960, 9443920, 18887840]

約数ペア:

[(1, 18887840), (2, 9443920), (4, 4721960), (5, 3777568), (8, 2360980), (10, 1888784), (16, 1180490), (20, 944392), (32, 590245), (40, 472196), (80, 236098), (97, 194720), (160, 118049), (194, 97360), (388, 48680), (485, 38944), (776, 24340), (970, 19472), (1217, 15520), (1552, 12170), (1940, 9736), (2434, 7760), (3104, 6085), (3880, 4868)]