21704990

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{167}}^1\times {\mathrm{317}}^1$

素因数の和:532

約数の個数: 32

約数和(自身を含む): 40388544

約数和(自身を除く): 18683554

約数列:

[1, 2, 5, 10, 41, 82, 167, 205, 317, 334, 410, 634, 835, 1585, 1670, 3170, 6847, 12997, 13694, 25994, 34235, 52939, 64985, 68470, 105878, 129970, 264695, 529390, 2170499, 4340998, 10852495, 21704990]

約数ペア:

[(1, 21704990), (2, 10852495), (5, 4340998), (10, 2170499), (41, 529390), (82, 264695), (167, 129970), (205, 105878), (317, 68470), (334, 64985), (410, 52939), (634, 34235), (835, 25994), (1585, 13694), (1670, 12997), (3170, 6847)]