19401940

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 42032592

約数和(自身を除く): 22630652

約数列:

[1, 2, 4, 5, 10, 20, 73, 97, 137, 146, 194, 274, 292, 365, 388, 485, 548, 685, 730, 970, 1370, 1460, 1940, 2740, 7081, 10001, 13289, 14162, 20002, 26578, 28324, 35405, 40004, 50005, 53156, 66445, 70810, 100010, 132890, 141620, 200020, 265780, 970097, 1940194, 3880388, 4850485, 9700970, 19401940]

約数ペア:

[(1, 19401940), (2, 9700970), (4, 4850485), (5, 3880388), (10, 1940194), (20, 970097), (73, 265780), (97, 200020), (137, 141620), (146, 132890), (194, 100010), (274, 70810), (292, 66445), (365, 53156), (388, 50005), (485, 40004), (548, 35405), (685, 28324), (730, 26578), (970, 20002), (1370, 14162), (1460, 13289), (1940, 10001), (2740, 7081)]