21335236

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{853}}^1$

素因数の和:920

約数の個数: 36

約数和(自身を含む): 41571012

約数和(自身を除く): 20235776

約数列:

[1, 2, 4, 13, 26, 37, 52, 74, 148, 169, 338, 481, 676, 853, 962, 1706, 1924, 3412, 6253, 11089, 12506, 22178, 25012, 31561, 44356, 63122, 126244, 144157, 288314, 410293, 576628, 820586, 1641172, 5333809, 10667618, 21335236]

約数ペア:

[(1, 21335236), (2, 10667618), (4, 5333809), (13, 1641172), (26, 820586), (37, 576628), (52, 410293), (74, 288314), (148, 144157), (169, 126244), (338, 63122), (481, 44356), (676, 31561), (853, 25012), (962, 22178), (1706, 12506), (1924, 11089), (3412, 6253)]