19907415

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{307}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 38054016

約数和(自身を除く): 18146601

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 131, 165, 307, 393, 495, 655, 921, 1179, 1441, 1535, 1965, 2763, 3377, 4323, 4605, 5895, 7205, 10131, 12969, 13815, 16885, 21615, 30393, 40217, 50655, 64845, 120651, 151965, 201085, 361953, 442387, 603255, 1327161, 1809765, 2211935, 3981483, 6635805, 19907415]

約数ペア:

[(1, 19907415), (3, 6635805), (5, 3981483), (9, 2211935), (11, 1809765), (15, 1327161), (33, 603255), (45, 442387), (55, 361953), (99, 201085), (131, 151965), (165, 120651), (307, 64845), (393, 50655), (495, 40217), (655, 30393), (921, 21615), (1179, 16885), (1441, 13815), (1535, 12969), (1965, 10131), (2763, 7205), (3377, 5895), (4323, 4605)]