21037845

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{761}}^1$

素因数の和:885

約数の個数: 32

約数和(自身を含む): 35844480

約数和(自身を除く): 14806635

約数列:

[1, 3, 5, 15, 19, 57, 95, 97, 285, 291, 485, 761, 1455, 1843, 2283, 3805, 5529, 9215, 11415, 14459, 27645, 43377, 72295, 73817, 216885, 221451, 369085, 1107255, 1402523, 4207569, 7012615, 21037845]

約数ペア:

[(1, 21037845), (3, 7012615), (5, 4207569), (15, 1402523), (19, 1107255), (57, 369085), (95, 221451), (97, 216885), (285, 73817), (291, 72295), (485, 43377), (761, 27645), (1455, 14459), (1843, 11415), (2283, 9215), (3805, 5529)]