19221520

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2477}}^1$

素因数の和:2587

約数の個数: 40

約数和(自身を含む): 45168984

約数和(自身を除く): 25947464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2477, 3880, 4954, 7760, 9908, 12385, 19816, 24770, 39632, 49540, 99080, 198160, 240269, 480538, 961076, 1201345, 1922152, 2402690, 3844304, 4805380, 9610760, 19221520]

約数ペア:

[(1, 19221520), (2, 9610760), (4, 4805380), (5, 3844304), (8, 2402690), (10, 1922152), (16, 1201345), (20, 961076), (40, 480538), (80, 240269), (97, 198160), (194, 99080), (388, 49540), (485, 39632), (776, 24770), (970, 19816), (1552, 12385), (1940, 9908), (2477, 7760), (3880, 4954)]