20815676964

素因数分解:

$2^2\times 3^2\times {\mathrm{257}}^1\times {\mathrm{643}}^1\times {\mathrm{3499}}^1$

素因数の和:4409

約数の個数: 72

約数和(自身を含む): 52919412000

約数和(自身を除く): 32103735036

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 257, 514, 643, 771, 1028, 1286, 1542, 1929, 2313, 2572, 3084, 3499, 3858, 4626, 5787, 6998, 7716, 9252, 10497, 11574, 13996, 20994, 23148, 31491, 41988, 62982, 125964, 165251, 330502, 495753, 661004, 899243, 991506, 1487259, 1798486, 1983012, 2249857, 2697729, 2974518, 3596972, 4499714, 5395458, 5949036, 6749571, 8093187, 8999428, 10790916, 13499142, 16186374, 20248713, 26998284, 32372748, 40497426, 80994852, 578213249, 1156426498, 1734639747, 2312852996, 3469279494, 5203919241, 6938558988, 10407838482, 20815676964]

約数ペア:

[(1, 20815676964), (2, 10407838482), (3, 6938558988), (4, 5203919241), (6, 3469279494), (9, 2312852996), (12, 1734639747), (18, 1156426498), (36, 578213249), (257, 80994852), (514, 40497426), (643, 32372748), (771, 26998284), (1028, 20248713), (1286, 16186374), (1542, 13499142), (1929, 10790916), (2313, 8999428), (2572, 8093187), (3084, 6749571), (3499, 5949036), (3858, 5395458), (4626, 4499714), (5787, 3596972), (6998, 2974518), (7716, 2697729), (9252, 2249857), (10497, 1983012), (11574, 1798486), (13996, 1487259), (20994, 991506), (23148, 899243), (31491, 661004), (41988, 495753), (62982, 330502), (125964, 165251)]