20806980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20399}}^1$

素因数の和:20428

約数の個数: 48

約数和(自身を含む): 61689600

約数和(自身を除く): 40882620

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 20399, 40798, 61197, 81596, 101995, 122394, 203990, 244788, 305985, 346783, 407980, 611970, 693566, 1040349, 1223940, 1387132, 1733915, 2080698, 3467830, 4161396, 5201745, 6935660, 10403490, 20806980]

約数ペア:

[(1, 20806980), (2, 10403490), (3, 6935660), (4, 5201745), (5, 4161396), (6, 3467830), (10, 2080698), (12, 1733915), (15, 1387132), (17, 1223940), (20, 1040349), (30, 693566), (34, 611970), (51, 407980), (60, 346783), (68, 305985), (85, 244788), (102, 203990), (170, 122394), (204, 101995), (255, 81596), (340, 61197), (510, 40798), (1020, 20399)]