2021139725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{20359}}^1$

素因数の和:20418

約数の個数: 36

約数和(自身を含む): 2885663520

約数和(自身を除く): 864523795

約数列:

[1, 5, 11, 19, 25, 55, 95, 209, 275, 361, 475, 1045, 1805, 3971, 5225, 9025, 19855, 20359, 99275, 101795, 223949, 386821, 508975, 1119745, 1934105, 4255031, 5598725, 7349599, 9670525, 21275155, 36747995, 80845589, 106375775, 183739975, 404227945, 2021139725]

約数ペア:

[(1, 2021139725), (5, 404227945), (11, 183739975), (19, 106375775), (25, 80845589), (55, 36747995), (95, 21275155), (209, 9670525), (275, 7349599), (361, 5598725), (475, 4255031), (1045, 1934105), (1805, 1119745), (3971, 508975), (5225, 386821), (9025, 223949), (19855, 101795), (20359, 99275)]