20020810

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{1427}}^1$

素因数の和:1518

約数の個数: 32

約数和(自身を含む): 38247552

約数和(自身を除く): 18226742

約数列:

[1, 2, 5, 10, 23, 46, 61, 115, 122, 230, 305, 610, 1403, 1427, 2806, 2854, 7015, 7135, 14030, 14270, 32821, 65642, 87047, 164105, 174094, 328210, 435235, 870470, 2002081, 4004162, 10010405, 20020810]

約数ペア:

[(1, 20020810), (2, 10010405), (5, 4004162), (10, 2002081), (23, 870470), (46, 435235), (61, 328210), (115, 174094), (122, 164105), (230, 87047), (305, 65642), (610, 32821), (1403, 14270), (1427, 14030), (2806, 7135), (2854, 7015)]