21574540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{491}}^1$

素因数の和:539

約数の個数: 48

約数和(自身を含む): 49180320

約数和(自身を除く): 27605780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 491, 676, 845, 982, 1690, 1964, 2197, 2455, 3380, 4394, 4910, 6383, 8788, 9820, 10985, 12766, 21970, 25532, 31915, 43940, 63830, 82979, 127660, 165958, 331916, 414895, 829790, 1078727, 1659580, 2157454, 4314908, 5393635, 10787270, 21574540]

約数ペア:

[(1, 21574540), (2, 10787270), (4, 5393635), (5, 4314908), (10, 2157454), (13, 1659580), (20, 1078727), (26, 829790), (52, 414895), (65, 331916), (130, 165958), (169, 127660), (260, 82979), (338, 63830), (491, 43940), (676, 31915), (845, 25532), (982, 21970), (1690, 12766), (1964, 10985), (2197, 9820), (2455, 8788), (3380, 6383), (4394, 4910)]