20512781485

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{229}}^1\times {\mathrm{997}}^1$

素因数の和:1406

約数の個数: 64

約数和(自身を含む): 30145029120

約数和(自身を除く): 9632247635

約数列:

[1, 5, 7, 17, 35, 85, 119, 151, 229, 595, 755, 997, 1057, 1145, 1603, 2567, 3893, 4985, 5285, 6979, 8015, 12835, 16949, 17969, 19465, 27251, 34579, 34895, 84745, 89845, 118643, 136255, 150547, 172895, 228313, 242053, 587843, 593215, 752735, 1053829, 1141565, 1210265, 1598191, 2559299, 2939215, 3881321, 4114901, 5269145, 7990955, 12796495, 17915093, 19406605, 20574505, 27169247, 34475263, 89575465, 135846235, 172376315, 241326841, 586079471, 1206634205, 2930397355, 4102556297, 20512781485]

約数ペア:

[(1, 20512781485), (5, 4102556297), (7, 2930397355), (17, 1206634205), (35, 586079471), (85, 241326841), (119, 172376315), (151, 135846235), (229, 89575465), (595, 34475263), (755, 27169247), (997, 20574505), (1057, 19406605), (1145, 17915093), (1603, 12796495), (2567, 7990955), (3893, 5269145), (4985, 4114901), (5285, 3881321), (6979, 2939215), (8015, 2559299), (12835, 1598191), (16949, 1210265), (17969, 1141565), (19465, 1053829), (27251, 752735), (34579, 593215), (34895, 587843), (84745, 242053), (89845, 228313), (118643, 172895), (136255, 150547)]