20459816

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{409}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 42767100

約数和(自身を除く): 22307284

約数列:

[1, 2, 4, 8, 13, 26, 37, 52, 74, 104, 148, 169, 296, 338, 409, 481, 676, 818, 962, 1352, 1636, 1924, 3272, 3848, 5317, 6253, 10634, 12506, 15133, 21268, 25012, 30266, 42536, 50024, 60532, 69121, 121064, 138242, 196729, 276484, 393458, 552968, 786916, 1573832, 2557477, 5114954, 10229908, 20459816]

約数ペア:

[(1, 20459816), (2, 10229908), (4, 5114954), (8, 2557477), (13, 1573832), (26, 786916), (37, 552968), (52, 393458), (74, 276484), (104, 196729), (148, 138242), (169, 121064), (296, 69121), (338, 60532), (409, 50024), (481, 42536), (676, 30266), (818, 25012), (962, 21268), (1352, 15133), (1636, 12506), (1924, 10634), (3272, 6253), (3848, 5317)]