20338960

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2621}}^1$

素因数の和:2731

約数の個数: 40

約数和(自身を含む): 47793816

約数和(自身を除く): 27454856

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2621, 3880, 5242, 7760, 10484, 13105, 20968, 26210, 41936, 52420, 104840, 209680, 254237, 508474, 1016948, 1271185, 2033896, 2542370, 4067792, 5084740, 10169480, 20338960]

約数ペア:

[(1, 20338960), (2, 10169480), (4, 5084740), (5, 4067792), (8, 2542370), (10, 2033896), (16, 1271185), (20, 1016948), (40, 508474), (80, 254237), (97, 209680), (194, 104840), (388, 52420), (485, 41936), (776, 26210), (970, 20968), (1552, 13105), (1940, 10484), (2621, 7760), (3880, 5242)]