257092017

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{223}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 438337536

約数和(自身を除く): 181245519

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 103, 123, 223, 273, 287, 309, 533, 669, 721, 861, 1339, 1561, 1599, 2163, 2899, 3731, 4017, 4223, 4683, 8697, 9143, 9373, 11193, 12669, 20293, 22969, 27429, 28119, 29561, 54899, 60879, 64001, 68907, 88683, 118859, 160783, 164697, 192003, 298597, 356577, 384293, 482349, 832013, 895791, 941729, 1152879, 2090179, 2496039, 2825187, 6270537, 6592103, 12242477, 19776309, 36727431, 85697339, 257092017]

約数ペア:

[(1, 257092017), (3, 85697339), (7, 36727431), (13, 19776309), (21, 12242477), (39, 6592103), (41, 6270537), (91, 2825187), (103, 2496039), (123, 2090179), (223, 1152879), (273, 941729), (287, 895791), (309, 832013), (533, 482349), (669, 384293), (721, 356577), (861, 298597), (1339, 192003), (1561, 164697), (1599, 160783), (2163, 118859), (2899, 88683), (3731, 68907), (4017, 64001), (4223, 60879), (4683, 54899), (8697, 29561), (9143, 28119), (9373, 27429), (11193, 22969), (12669, 20293)]