20708890

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1997}}^1$

素因数の和:2082

約数の個数: 32

約数和(自身を含む): 40135824

約数和(自身を除く): 19426934

約数列:

[1, 2, 5, 10, 17, 34, 61, 85, 122, 170, 305, 610, 1037, 1997, 2074, 3994, 5185, 9985, 10370, 19970, 33949, 67898, 121817, 169745, 243634, 339490, 609085, 1218170, 2070889, 4141778, 10354445, 20708890]

約数ペア:

[(1, 20708890), (2, 10354445), (5, 4141778), (10, 2070889), (17, 1218170), (34, 609085), (61, 339490), (85, 243634), (122, 169745), (170, 121817), (305, 67898), (610, 33949), (1037, 19970), (1997, 10370), (2074, 9985), (3994, 5185)]